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Background: Injectable poly‐l‐lactic acid (PLLA) carries the risk of nodule or microlump formation. Various methods including sonication have been tried to minimize these adverse effects of PLLA. Aims: This study investigated the change in size, distribution, and properties of PLLA particles after sonication, and the duration of sonication needed to reach the ideal particle size. Methods and Materials: Two indicators, the average size of PLLA particles and diameter at 90%, were measured at each timepoint: at 0, 10, 60, 120, and 240 minutes of sonication. The characteristics and particle shape were assessed at 0 and 240 minutes. Results: The average particle size and the diameter at 90% decreased drastically until 10 minutes of sonication and then increased slightly at 60 minutes. After 60 minutes, the average size and the diameter at 90% gradually decreased over time and reached 42.2 μm and 75.7 μm, respectively, at 120 minutes. After 240 minutes of sonication, the average particle size was 35.9 μm, much smaller than the smallest proper size required (40 μm). Standard deviation decreased gradually over time, which means that a more even distribution was obtained. Crystalline remnants were significantly less left with 120 minutes sonication compared to those with 120 minutes hydration only. PLLA particles were more cracked at the center, and microcrystals were more loosely distributed at the periphery after 120 minutes sonication. Conclusion: Sonication help reduce the average size of PLLA particles and achieve more even distribution. Therefore, we believe sonication may attribute to the safer use of PLLA. [ABSTRACT FROM AUTHOR]

Introduction: The aim of this study was to explore the perceptions of women about their experience in using crack cocaine, discussing their motivations for using it and the repercussions in their lives. Objective: To investigate these experiences, a qualitative exploratory study was conducted, using the inductive thematic analyses of the content. Methods: Eight female crack cocaine users took part in this study. They were assessed by a semi-structured interview, addressing the crack cocaine use experience. Four main themes emerged in the interviews: (1) crack cocaine "high" experience; (2) symptoms related to crack cocaine use; (3) circumstances of crack cocaine use; and (4) crack cocaine use consequences. Results: The main perceptions reported by the users were related to a feeling of being disconnected to the world preceded by a pleasant experience, especially during the first moments of use. They revealed that the drug fulfills a key role of coping strategy to handle with negative thoughts, emotions or life experiences. An important influence of social issues was reported in relation to the onset of crack cocaine use. Negative consequences and significant impact on their lives appeared in their reports, regarding the loss of family ties, involvement with prostitution, traumatic experiences and violence. Conclusion: Taking together all women's perceptions suggests that beyond the positive immediate rewarding effect, the maintenance of use might be related to the dissociative experience and self-medication role, acting as negative reward by relieving of negative life experiences that, in turn, are both cause and consequence of the drug use. [ABSTRACT FROM AUTHOR]

The proximal femur's numerical simulation could give an effective method for predicting the risk of femoral fracture. However, the majority of existing numerical simulations is static, which does not correctly capture the dynamic properties of bone fractures. On the basis of femoral fracture analysis, a dynamic simulation using incremental element deletion (IED)-based finite element analysis (FEA) was developed and compared to XFEM in this study. Mechanical tests were also used to assess it. Different impact speeds, fall postures, and cortical thicknesses were also studied for their implications on fracture types and mechanical responses. The time it took for the crack to shatter was shorter when the speed was higher, and the crack line slid down significantly. The fracture load fell by 27.37% when the angle was altered from 15° to 135°, indicating that falling forward was less likely to cause proximal femoral fracture than falling backward. Furthermore, the model with scant cortical bone was susceptible to fracture. This study established a theoretical foundation and mechanism for forecasting the risk of proximal femoral fracture in the elderly. [ABSTRACT FROM AUTHOR]

Disparities in urology are well-documented but less is known about the role of translational research within existing interventional models to address inequalities. In this narrative review, we utilize an accepted framework of the process of translational research in mitigating disparities to investigate current translational and interventional urologic programs that bridge the gap. Three established, disparity-focused urologic interventional programs were identified and are highlighted in depth. Finally, we extrapolate from these findings to provide 10 policy relevant implications to help move urologic disparities research from evidence synthesis to translational research. [ABSTRACT FROM AUTHOR]

Cocaine is one of the most consumed stimulants throughout the world, as official sources report. It is a naturally occurring sympathomimetic tropane alkaloid derived from the leaves of Erythroxylon coca, which has been used by South American locals for millennia. Cocaine can usually be found in two forms, cocaine hydrochloride, a white powder, or 'crack' cocaine, the free base. While the first is commonly administered by insufflation ('snorting') or intravenously, the second is adapted for inhalation (smoking). Cocaine can exert local anaesthetic action by inhibiting voltage-gated sodium channels, thus halting electrical impulse propagation; cocaine also impacts neurotransmission by hindering monoamine reuptake, particularly dopamine, from the synaptic cleft. The excess of available dopamine for postsynaptic activation mediates the pleasurable effects reported by users and contributes to the addictive potential and toxic effects of the drug. Cocaine is metabolised (mostly hepatically) into two main metabolites, ecgonine methyl ester and benzoylecgonine. Other metabolites include, for example, norcocaine and cocaethylene, both displaying pharmacological action, and the last one constituting a biomarker for co-consumption of cocaine with alcohol. This review provides a brief overview of cocaine's prevalence and patterns of use, its physical-chemical properties and methods for analysis, pharmacokinetics, pharmacodynamics, and multi-level toxicity. [ABSTRACT FROM AUTHOR]

Copyright of Saúde Coletiva is the property of MPM Comunicacao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

"Does society have the right to force pregnant drug addicts to abort their fetuses?" This was the question that Professor George Schendler from Southern Illinois University at Carbondale posed in his 1991 journal article. Schendler was not the only person to suggest criminalizing the behavior of pregnant people to prevent what were colloquially known as "crack babies." This article analyzes how discursive narratives of an immediate and long-term crisis, framed through the diseased body of an innocent yet simultaneously dangerous infant, erroneously predicted the onslaught of dependent Black and Brown children who would supposedly cripple American society. By focusing on the infamous 1994 "Keystone Kids" case in Chicago, IL, I argue that the steps taken to eliminate "crack babies" instead criminalized Black and Brown women's pregnancies and separated children from their parents. [ABSTRACT FROM AUTHOR]

ABSTRACT BACKGROUND: It is well known that early start of drug use can lead users to psychosocial problems in adulthood, but its relationship with users’ direct healthcare costs has not been well established OBJECTIVES: To estimate the direct healthcare costs of drug dependency treated at a community mental health service, and to ascertain whether early start of drug use and current drug use pattern may exert influences on these costs. DESIGN AND SETTING: Retrospective cross-sectional study conducted at a community mental health service in a municipality in the state of São Paulo, Brazil. METHODS: The relationships between direct healthcare costs from the perspective of the public healthcare system, age at start of drug use and drug use pattern were investigated in a sample of 105 individuals. A gamma-distribution generalized linear model was used to identify the cost drivers of direct costs. RESULTS: The mean monthly direct healthcare costs per capita for early-start drug users in 2020 were 1,181.31 Brazilian reais (BRL) (274.72 United State dollars (USD) according to purchasing power parity (PPP)) and 1,355.78 BRL (315.29 USD PPP) for late-start users. Early start of drug use predicted greater severity of cannabis use and use of multiple drugs. The highest direct costs were due to drug dependence combined with alcohol abuse, and due to late start of drug use. CONCLUSIONS: Preventive measures should be prioritized in public policies, in terms of strengthening protective factors before an early start of drug use.

Introduction: Human Immunodeficiency Virus infection is a prevalent infection occurring during pregnancy. The implementation of a program to screen and prevent vertical transmission is highly important in Public Healthcare. Pregnant crack users could face difficulties to test and adhere to the Highly Active Antiretroviral Therapy. Objective: The purpose of this research paper was to investigate whether crack cocaine abuse increases Human Immunodeficiency Virus perinatal transmission rates, as well as to evaluate the risk factors associated with such an increase. Methods: Design: A retrospective study. Setting: Department of Obstetrics and Gynecology, General Hospital of Universidade Federal do Paraná. Population: pregnancies of Human Immunodeficiency Virus-positive women who were using crack cocaine (n=64) were compared with that of non-users (n=826) from 2005 to 2013. Prenatal medical records, delivery records, and newborn records were analyzed. Main Outcome Measures: The vertical transmission of Human Immunodeficiency Virus in the group of crack cocaine users was 9.37% (6) versus 2.54% (21) among non-users (p=0.009744). Results: Over the years of the study, there was a decrease in the vertical transmission rate in non-users, while this number remained constant in the group of users. When analyzing the cases of perinatal transmission, it was found that 83.34% (5) had inadequate prenatal care, and 100% (6) had inadequate Human Immunodeficiency Virus treatment, compared to the group in which there was no vertical transmission, where 65.52% (38) had inadequate prenatal care and 70.86% (41) had inadequate treatment. Conclusion: Vertical transmission is higher among crack cocaine users and did not decrease over the years of the study, as occurred among non-users. Trends that explain this increase were non-adherence to adequate prenatal care, Human Immunodeficiency Virus diagnosis during pregnancy, irregular treatment, absence of intrapartum antiretroviral prophylaxis, and vaginal delivery route.

Introduction: The causal mechanisms behind crack/cocaine use are still unknown, but genetic influences are suggested. Objective: To investigate the relationship between the genetic polymorphism TaqI (rs1800497) in the dopamine D2 receptor (DRD2) gene and susceptibility to crack/cocaine dependence in a group of addicts to crack/cocaine and a non-addicted group. Methods: The case group (n=515) was composed of crack/cocaine-dependent men and the control group (n=106) comprised men who were considered not dependent on crack/cocaine. The oral hygiene habits, decayed, missing, and filled teeth index, gingival index, and plaque index were evaluated. The reference single nucleotide polymorphism (rs1800497 C/T) of the DRD2 gene was genotyped by a real-time polymerase chain reaction technique. Student’s t-tests for independent samples or the non-parametric Mann-Whitney test were used to compare groups regarding quantitative variables. Results: The case group showed a mean time of 9.91±7.03 years of crack use, and 61.06±92.96 stones/week. The socio-demographic profile of the sample was White, single men, with basic education, blue-collar worker, smoker, and reporting alcohol use. There was a high frequency of gingival inflammation, plaque accumulation, and caries experience. For all genetic models tested, there was no significant difference in the genotypic frequency in rs1800497 of the DRD2 gene, between case and control groups (p>0.05). Conclusion: The genetic variant in the DRD2 did not increase the vulnerability to develop crack/cocaine dependence. The complex genetic nature of crack/cocaine dependence and a large variation of DRD2 allele frequencies, depending on the population group sampled, could be one explanation for the no association.

IntroductionThe aim of this study was to explore the perceptions of women about their experience in using crack cocaine, discussing their motivations for using it and the repercussions in their lives.ObjectiveTo investigate these experiences, a qualitative exploratory study was conducted, using the inductive thematic analyses of the content.MethodsEight female crack cocaine users took part in this study. They were assessed by a semi-structured interview, addressing the crack cocaine use experience. Four main themes emerged in the interviews: (1) crack cocaine “high” experience; (2) symptoms related to crack cocaine use; (3) circumstances of crack cocaine use; and (4) crack cocaine use consequences.ResultsThe main perceptions reported by the users were related to a feeling of being disconnected to the world preceded by a pleasant experience, especially during the first moments of use. They revealed that the drug fulfills a key role of coping strategy to handle with negative thoughts, emotions or life experiences. An important influence of social issues was reported in relation to the onset of crack cocaine use. Negative consequences and significant impact on their lives appeared in their reports, regarding the loss of family ties, involvement with prostitution, traumatic experiences and violence.ConclusionTaking together all women's perceptions suggests that beyond the positive immediate rewarding effect, the maintenance of use might be related to the dissociative experience and self-medication role, acting as negative reward by relieving of negative life experiences that, in turn, are both cause and consequence of the drug use.

The current study investigated whether stressful life events and everyday discrimination experiences were associated with using one or more substances in the past 30‐days and substance use disorder (SUD) among adults experiencing homelessness. We obtained survey data from adults (N = 501) seeking services at a day shelter. Participants self‐reported whether they used cigarettes, other tobacco products, cannabis, alcohol, opioids, amphetamine, and cocaine/crack in the past 30‐days, and the total number of substances used were also calculated. We measured stressful life events and everyday discrimination using validated scales. We used multivariable logistic and negative binomial regression analyses to evaluate hypothesised associations. Results indicated that reporting a higher number of stressful life events was associated with past 30‐days cannabis, tobacco, alcohol, and other substance use, screening positive for a SUD, and using a greater number of substances in the past 30 days. After accounting for stressful life events, everyday discrimination was associated with only past 30‐days cannabis use. Overall, we found that reporting stressful life events was related to current substance use and screening positive for a SUD. Findings suggest that life stressors, and discrimination to a lesser extent, were associated with substance use and SUD among adults experiencing homelessness. [ABSTRACT FROM AUTHOR]

Knowledge about the motivations for crack cocaine use and the long-term effects among people who inject heroin is limited. This study aims to understand motivations associated with this co-use drug pattern among aging men entrenched in established intergenerational heroin subcultures. A sample of 60 men with diverse injecting heroin use histories was recruited from low-income Mexican American urban communities for semi-structured ethnographic interviews using respondent-driven sampling. Qualitative analysis was then employed to provide an in-depth understanding of patterns and motivations of polydrug use among this older population. The men discussed motivations including tolerance, curiosity and experimentation, a paradox of affordability, alternatives to the health hassles and stigma, and the cross-fertilization of drug markets. Concurrent and switching use patterns were primarily reported among those seeking a new or different high, while replacement patterns were reported by men in methadone treatment or by those who had tired of injection. Findings translate to the on-going opioid crisis and the emerging trend in polysubstance use involving crack cocaine, methamphetamine and other psychostimulants among people who use heroin. More research is needed to investigate the full range of social and health consequences associated with these co-use patterns. Targeted and tailored prevention and treatment services are essential to improve outcomes among aging Mexican American men who use heroin and other persons with similar polydrug use patterns. [ABSTRACT FROM AUTHOR]

Issues: Use of crack cocaine and associated medical complications persists globally. Some reports in medical literature describe a sight‐threatening condition commonly referred to as 'crack eye' or 'crack eye syndrome'. The purpose of this review is to describe what is known about crack eye from case reports in peer‐reviewed literature. Approach: A structured search was completed in MEDLINE, TOXLINE, EMBASE, PsychInfo, Scopus and Biomed Central, to collect case reports and case series on corneal complications attributed to crack cocaine smoking. Key Findings: Of 111 articles screened, 11 contained case reports or series. Thirty individual cases of 'crack eye' were reported. The majority (63%) of cases had bilateral involvement; 83% of all cases with microbial culture results had corneal infections. Aggressive treatment caused an improvement in 95% of all cases and 23% of all cases were lost to follow up. Of those who received treatment for corneal complications associated with crack cocaine, 22% remained with significant visual impairment (hand motions only) in the affected eye. Implications: Clinicians should consider crack cocaine involvement in patients presenting with corneal disease without known predisposing factors, and elicit comprehensive drug histories to prevent a reduction in visual acuity. Conclusion: Corneal complications of crack cocaine smoking are caused by a number of synergistic factors, including direct toxicity of crack cocaine vapours to surface cells, impairment of neurogenic support to corneal epithelial integrity, desiccation of the eye surface due to diminished blinking reflex, low level chemical burns and mechanical denudement of surface cells through eye rubbing. [ABSTRACT FROM AUTHOR]

Copyright of SMAD Revista Electronica Salud Mental, Alcohol y Drogas is the property of Universidade de Sao Paulo, Escola de Enfermagem de Ribeirao Preto and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aim of the present study was to compare the prevalence of dental caries between crack cocaine users and a control group. The study included 106 participants in each group matched for age, sex, and exposure to tobacco. Crack cocaine users were selected from institutions for the treatment of chemical dependency, and the control group was recruited from a public school and among patients who sought dental care. A calibrated examiner determined dental caries experience [Decayed, Missing and Filled Teeth (DMFT) index]. The severity of tooth decay was determined using the Significant Caries Index (SiC). The prevalence of dental caries (DMFT ≥ 1) was 96.2 and 81.1% among the crack cocaine users and nonusers, respectively. Crack users had higher mean DMFT values (7.16 versus 4.92) for the decayed and missing components as well as a higher percentage of individuals with highly severe caries compared to nonusers. After the adjustments in the multivariate model, the prevalence of caries was 18% higher among the crack users (prevalence ratio: 1.18; 95% confidence interval: 1.08–1.30). Age, family income, crack cocaine use, and dental calculus were associated with the occurrence of dental caries. In conclusion, the prevalence of caries was higher among the crack users compared with the control group and remained associated with dental caries in the multivariate analysis. [ABSTRACT FROM AUTHOR]

Accessible summary: What is known on the subject?: Relapse rates are high among patients who have experienced first‐episode psychosis (FEP).Psychotic relapses are associated with worse quality of life and poorer functionality of the FEP patient.The use of psychoactive substances, non‐adherence to drug treatment, and high expressed emotion (EE) are notable predictors of relapse after the FEP.Although some studies have suggested that psychotic relapse may be associated with a family environment with high levels of emotional over‐involvement (EOI), this finding is still inconsistent across different cultures.EE specific components must be evaluated and interpreted according to the context of cultural norms.There is a scarcity of studies on the role of depression in the occurrence of relapses after the FEP, and the results remain uncertain. What the paper adds to existing knowledge?: This study explored the predictors of psychotic relapses in Brazilian patients who experienced FEP.Our results indicate that 29.2% of the patients relapsed after the FEP.Patients diagnosed with depression and high‐EOI in the family environment were predictors of psychotic relapses in this population.This study expands knowledge about the cultural specificity of EOI and the role of depression in psychotic relapse. What are the implications for practice?: Nursing professionals must consider the implications of the family environment and depression in the course of psychosis.Family interventions and the appropriate treatment of depression are important for improving the prognosis of FEP patients. Introduction: Psychotic relapse may be associated with relatives' high emotional over‐involvement (EOI) and with a diagnosis of major depressive episode (MDE) among first‐episode psychosis (FEP) patients, but the results are still inconsistent across different cultures. Aim: Evaluate the predictors of relapse in FEP patients. Method: Prospective cohort study with 6‐month follow‐up conducted with 65 dyads of patients and relatives from an early intervention unit in Brazil. At the baseline interview, relatives answered to a sociodemographic data form and to the Family Questionnaire. Patients provided sociodemographic and clinical data and answered the Measurement of Treatment Adherence; the Alcohol, Smoking and Substance Involvement Screening Test; the Severity of Dependence Scale to assess cannabis dependence, and the MDE module of the Mini‐International Neuropsychiatric Interview. Psychotic relapses were evaluated using items from the Brief Psychiatric Rating Scale. The data were analysed using multiple logistic regression. Results: 29.2% of the patients presented at least one psychotic relapse. High‐EOI and MDE were predictors of psychotic relapses. Discussion: Our findings expand the knowledge about the cultural specificity of EOI and the role of depression in psychotic relapse. Implications for practice: Family nursing interventions and the appropriate treatment of MDE must be considered in the care of FEP patients. [ABSTRACT FROM AUTHOR]

This case report describes a 31-year-old man with 10 years of cocaine and cannabis dependence who developed reverse Takotsubo cardiomyopathy (rTC), a rare variant of Takotsubo cardiomyopathy. He presented to the Emergency Department (ED) with severe left temporal headache and vomiting which began whilst smoking cannabis and several hours after smoking methamphetamine and using cocaine via insufflation. Computed tomography and angiography of the brain was normal, and the headache resolved with analgesia. Urine drug screen was positive for benzodiazepines, cannabinoids, cocaine, opiates (attributed to morphine administered in ED) and amphetamines. Three hours later he had a seizure and within 10 min developed cardiogenic shock with antero-inferior ST segment depression on electrocardiogram and troponin-T rise to 126 ng/L. Coronary angiography demonstrated normal coronary arteries. Transthoracic echocardiogram demonstrated severely impaired left ventricular (LV) systolic function with ejection fraction 15–20% and hypokinesis sparing the apex. Thyrotoxicosis, nutritional, vasculitic, autoimmune and viral screens were negative. Cardiac magnetic resonance imaging demonstrated severe LV functional impairment with dilated and hypocontractile basal segments, and T2 hyperintensity consistent with myocardial oedema and rTC. He received supportive management. Proposed mechanisms of rTC include catecholamine cardiotoxicity and coronary artery vasospasm. In this case, multiple insults including severe headache, cannabis hyperemesis and cocaine and methamphetamine-induced serotonin toxicity culminated in a drug-induced seizure which led to catecholamine cardiotoxicity resulting in rTC. Clinicians should be cognizant of stress cardiomyopathy as a differential diagnosis in patients with substance use disorders. [ABSTRACT FROM AUTHOR]

Abstract Background Numerous reports have led to concerns that fentanyl is added to many street drugs as an adulterant, including to stimulants like cocaine and methamphetamine, and could increase risks for negative health outcomes. Methods We collected information regarding recent substance use through self-report and urine toxicology (confirmed with mass spectrometry) once a month for up to 6 monthly study visits from a probability sample of 245 women in San Francisco with a history of housing instability (2016-2019). We compared the presence of fentanyl metabolites with (1) the presence of metabolites for other substances and (2) self-reported past week substance use. Results Out of 1050 study visits, fentanyl metabolites were detected 35 times (i.e., at 3% of all study visits and among 19/245, or 8% of all women). In most but not all (91%, or 32/35) of these detected cases, heroin or opioid medication use was self-reported. Among women who reported cocaine or methamphetamine use, but did not use heroin or opioid medication, fentanyl was detected in only 1 of 349 cases (0.3%). In adjusted logistic regression, the presence of fentanyl metabolites was independently associated with (1) presence of opiate, heroin, and benzodiazepine metabolites, and (2) self-reported past week use of heroin and opioid medications. Fentanyl metabolite detection was not independently associated with cocaine or methamphetamine use. Conclusions The presence of fentanyl metabolites in this population was almost entirely among women who also reported using heroin or opioid pills. These data do not support the hypothesis that fentanyl is being routinely added to stimulants as an adulterant on a large scale in this region.

Abstract Background Despite the advance in studies addressing the use of crack cocaine, knowledge about the characteristics of users that seek treatment in the different modalities of care for substance use disorders is important to plan the operationalization of these services. Objective To analyze the prevalence and factors associated with the use of crack cocaine in outpatients. Method Cross-sectional study consisting in the analysis of the medical records of outpatients of a chemical dependency clinic located in the south of Brazil from 1999 to 2015. The Fisher’s exact test and the Poisson regression model were used to analyze the data. Results Medical records from 1,253 patients were analyzed, and 1,196 (95.5%) of them contained information on the use of crack cocaine. Use of this substance was reported by 47% (95% CI [44, 50]) of the outpatients. The risk group was composed of adults aged 20-39 years, with no income, who had three or more children, did not consume alcohol or marijuana, had continuous family assistance, spontaneously looked for the service, and had already been hospitalized or assisted at a therapeutic community or psychosocial center. Conclusion There is great demand for the outpatient care of crack cocaine users. It is crucial that the risk factors guide treatment planning.

Aims: Cocaine Use Disorder (CUD) is an important health issue, associated with structural brain abnormalities. However, the impact of the route of administration and their predictive value for relapse remain unknown., Methods: We conducted an anatomical MRI study in 55 CUD patients (26 CUD-Crack and 29 CUD-Hydro) entering inpatient detoxification, and 38 matched healthy controls. In patients, a 3-months outpatient follow-up was carried out to specify the treatment outcome status (relapser when cocaine was consumed once or more during the past month). A Voxel-Based Morphometry approach was used., Results: Compared with controls, CUD patients had widespread gray matter alterations, mostly in frontal and temporal cortices, but also in the cerebellum and several sub-cortical structures. We then compared CUD-Crack with CUD-Hydro patients and found that crack-cocaine use was associated with lower volume in the right inferior and middle temporal gyri, and the right fusiform gyrus. Cerebellar vermis was smaller during detoxification in subsequent relapsers compared to three-months abstainers., Conclusions: Patients with CUD display widespread cortical and subcortical brain shrinkage. Patients with preferential crack-cocaine use and subsequent relapsers showed specific gray matter volume deficits, suggesting that different patterns of cocaine use and different clinical outcome are associated with different brain macrostructure., Competing Interests: Declaration of competing interest All authors declared no financial disclosures or conflict of interest., (Copyright © 2024 The Author(s). Published by Elsevier B.V. All rights reserved.)

Among the many people experiencing grief in response to opioid overdose deaths, individuals with opioid use disorder (OUD) bear one of the largest emotional burdens. Grief and loss of social support networks have the potential to destabilize OUD and result in overdose, suicide, and other harmful consequences. However, few clinicians discuss how overdose losses impact their patients with OUD, let alone consider the role of grief in treatment outcomes. Lessons from the acquired immunodeficiency syndrome (AIDS) epidemic and crack cocaine crisis can inform our understanding of grief in the context of stigma and societal injustices. In this commentary, we describe how these historical lessons can be adapted to the opioid overdose crisis to improve the care of people with OUD. [ABSTRACT FROM AUTHOR]

This article is based on ethnographic research that has developed in the São Paulo region known as Cracolândia. Ethnographic accounts are added to the portion of academic literature on the subject, some news in the media and excerpts from conversations with visitors from that specific part of the neighborhood of Luz. Through them, we seek to make sense of a more human picture of the place and the people who have found a way of life there. We have come to know that people who use crack in that context cannot be scaled solely by their drug use; and that even Cracolândia can be perceived and experienced as a place full of joy and humanity, despite the moral panic surrounding crack. [ABSTRACT FROM AUTHOR]

Drug policy has shifted from intense criminalization toward reforms that prioritize decarceration and treatment. Despite this shift, little is known about whether support for recent treatment-oriented drug policy is equitable by users' race and the drug type. Using the opiate and crack cocaine crises as cases, we analyze 400 articles from the New York Times and Washington Post to assess the degree to which the two crises were racialized, criminalized, and medicalized. We find that media coverage medicalized and humanized White people who use opiates, while coverage of crack cocaine focused on criminalization, vilifying Black people who use drugs. We then conduct two vignette experiments (N=308; N=630) to examine whether these racialized frames shape public support for treatment or criminalization. We find the public more likely to support criminalization for Black people, while supporting drug treatment for White people. Respondents are more likely to support drug treatment for heroin use than for crack cocaine. Our findings suggest that support for medicalized approaches to drug use is more likely to occur for White people and drugs linked to White people, while Black people and drugs associated with Black people continue to be perceived as largely amenable to punitive options. [ABSTRACT FROM AUTHOR]

Sexual and gender minority youth (SGMY) disproportionately experience intimate partner violence (IPV) and report illicit substance use compared with cisgender heterosexual youth. Cognitive reappraisal strategies have been shown to decrease trauma-exposed individuals' likelihood of engaging in substance use. However, virtually no research has examined the relationship between various forms of IPV, including identity abuse, and illicit substance use, as well as the protective role of cognitive reappraisal among IPV-exposed SGMY. The current study addressed these limitations and examined cognitive reappraisal as a moderator of the associations between various IPV forms and illicit substance use among 149 SGMY (ages 18-25; 28.9% bisexual, 42.3% transgender or gender nonbinary, 45.0% racial and ethnic minority) between 2016 and 2017. Results indicated that many SGMY used cocaine in the past 6 months (24.8%), followed by hallucinogens (24.8%), stimulants (22.8%), and heroin (20.8%). More than half (62.4%) of SGMY experienced psychological abuse, 44.3% physical abuse, and 43.6% identity abuse in the past year. Cognitive reappraisal buffered the associations between two forms of IPV, identity abuse and physical abuse, and illicit substance use among SGMY, underscoring its importance for clinical intervention. Specifically, past year identity abuse and physical abuse were associated with greater illicit substance use only for SGMY with lower cognitive reappraisal, not for youth with higher cognitive reappraisal. This study adds to the burgeoning literature on identity, physical, and psychological forms of IPV and illicit substance use among SGMY. Our findings provide evidence that cognitive reappraisal strategies buffer the effect of identity abuse and physical abuse on illicit drug use among SGMY. These findings shed light on new avenues for clinical intervention that may help to reduce the prevalence of illicit substance use among IPV-exposed SGMY. [ABSTRACT FROM AUTHOR]

Gender significantly influences sociodemographic, medical, psychiatric and addiction variables in cocaine outpatients. Educational level may be a protective factor showing less severe addictive disorders, longer abstinence periods, and better cognitive performance. The aim was to estimate gender-based differences and the influence of educational level on the clinical variables associated with cocaine use disorder (CUD). A total of 300 cocaine-consuming patients undergoing treatments were recruited and assessed using the Psychiatric Research Interview for Substance and Mental Diseases according to the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision. Women developed CUD later but exhibited more consumption of anxiolytics, prevalence of anxiety disorders, eating disorders, and major depressive disorders. Alcohol and cannabis use disorders were more frequent in men. A predictive model was created and identified three psychiatric variables with good prognosis for distinguishing between women and men. Principal component analysis helped to describe the different profile types of men and women who had sought treatment. Low educational levels seemed to be a risk factor for the onset, development, and duration of CUD in both genders. Women and men exhibited different clinical characteristics that should be taken into account when designing therapeutic policies. The educational level plays a protective/risk role in the onset, development and progression of CUD, thus prolonging the years of compulsory education and implementing cognitive rehabilitation programmes could be useful. [ABSTRACT FROM AUTHOR]

Drug use disorder (DUD) is a serious health condition that imposes a heavy burden on the persons who have a drug addiction experience and their families, especially in countries, such as Myanmar, where few formal support mechanisms are in place and repressive drug laws exacerbate the situation. Yet, in Myanmar, little is known about how informal caregivers are affected. This qualitative study aims at exploring the socioeconomic and psychological burden that informal caregivers in Myanmar encounter, coping strategies they employ, as well as barriers to coping they face. Thirty primary informal caregivers were chosen purposively from a mental health hospital in Yangon for in-depth interviews. The recorded interviews were transcribed and the data were analysed using framework analysis. The results revealed that financial constraint, income loss, social limitation and negative impact on family cohesion are important dimensions of socioeconomic burden, whereas sadness, anger, helplessness, worry, fear and guilt are the main psychological distress factors encountered by caregivers of persons with DUD. Key coping strategies employed by caregivers include religious coping, financial coping, acceptance and planning. Moreover, perceived stigma towards persons with DUD and their caregivers was very high and caregivers received hardly any social support, inter alia because of the country's drug law which reinforces stigma and discrimination. Neither the government nor any other organization in Myanmar provided financial support to the caregivers. The results of this study showed that caring for persons with DUD has devastating effects on caregivers and their families. While the 2018 National Drug Control Policy can potentially help alleviate the burden on substance users and their families, further amendments of the existing drug law are urgently needed. Moreover, strengthening prevention and harm reduction approaches, improving treatment and rehabilitation services, as well as stigma-reducing educational campaigns should be considered a priority. [ABSTRACT FROM AUTHOR]

This cross-sectional qualitative study analyzed characteristics of social support for users of crack cocaine and the role of "Consultório na Rua" (CR), or "Office in the Street," a Brazilian program for people living on the street. Data were collected using 1) ethnographic field observations during the delivery of services from this program, 2) in-depth interviews with 17 users of crack cocaine, and 3) a focus group with professionals from CR. To analyze data, we used content analysis and analytical categories based on Social Network Analysis (SNA) theoretical statements. Results showed that family, peers, community members, and professionals from CR were the main social support providers. Participants mentioned receiving material, informational, and emotional support from CR members. It was observed that CR had a welcoming and inclusive approach, but CR team members identified challenges related to stigma directed toward people who use substances and live on the street. CR assumed a central role in the health and social assistance of users of crack cocaine living on the street, providing an important link to healthcare and social services. However, initiatives related to motivation to receive mental health services, treatment, or social reintegration were not observed in conjunction with this program. • We used social network analysis to explore the experience of users of crack cocaine. • The supporters mentioned were family, peers, community members and professionals. • The participants mentioned at least one other user of crack cocaine as a supporter. • Professionals offered and users received material, informational, and emotional support. • The team professionals played an important role in the social support networks. [ABSTRACT FROM AUTHOR]

Objective: To identify the socioeconomic characteristics, the pattern of use of psychoactive substances and the mental disorders associated with the use of crack and cocaine. Methods: Characterized as descriptive, cross-sectional and with a quantitative approach, carried out with 112 participants who had a history of crack and/or cocaine use, with the application of socioeconomic questionnaires, on the pattern of substance use psychoactive drugs and the Mini International Neuropsychiatric Interview to screen for mental disorders. The data were analyzed using the Statistical Package for the Social Sciences software. Results: 97 (86.6%) were male, 63 (56.3%) were self-declared brown, 102 (91.1%) with religion, 95 (84.8%) were single (single, divorced, widowed), 83 (74.1%) studied until elementary school, 71 (63.4%) has children. In view of the application of Mini International Neuropsychiatric Interview, a frequency of 69 (61.6%) participants with a current major depressive episode was identified, of these 34 (30.4%) presenting a recurrent major depressive episode. Half of the participants, 55 (49.1%), are at risk of suicide. Conclusion: The tracking of the psychiatric profile of cocaine and crack users supports the development of treatment protocols and intervention measures in a more individualized way, which will reflect on coping with treatment. [ABSTRACT FROM AUTHOR]

Background: Community-campus partnerships have been a major developing field of study in improving health outcomes to reduce health disparities. However, there is limited literature that evaluates communication strategies used to improve health outcomes among disadvantaged populations during the early stages of implementing community-campus partnerships. Objectives: Based on the Donabedian model, we conducted a retrospective quasi- qualitative synthesis of literature relating to the identification and evaluation of community engaged communication in community-campus partnerships to address health disparities. Data sources: All published peer-reviewed articles from 2001 to 2013 that addressed health disparities in community-campus partnerships were reviewed. Key word searches from PubMed, MEDLINE, CINAHL, Social SciSearch, ProQuest, and Communication and Mass Media Complete databases were performed. Design: Donabedian's structure, process and outcome model was used to provide a framework for the inclusion and exclusion criteria of studies. Using a quasi-qualitative approach, qualitative and quantitative analysis were used to compare the relationship between studies and inferential statistics respectively. Themes were identified and described. Data were extracted on each study's characteristic and application of components on the Donabedian model in community-campus partnerships. Results: Forty-two articles met the inclusion criteria. All articles described by using some part of the Donabedian model to improve health outcomes. However, there was great variability in the frequency of communication structures and processes used. We found that communication processes and strategies have an association with improving health outcomes, especially among disadvantaged and vulnerable populations (r = 0.863, p<0.01). Conclusion: Community engaged communication processes and strategies are powerful tools to engage underserved populations. Consequently, under the premise of a community-campus partnership, well-conceived and implemented communication approaches greatly improve health outcomes in disadvantaged populations. [ABSTRACT FROM AUTHOR]

Objective: To estimate the prevalence and factors associated with the effect of alcohol on crack cocaine use and to analyze experiences related to combined use. Materials and methods: sequential mixed methods (qualitative and quantitative) research, carried out between August 2014 and August 2015 with people who use crack. In the quantitative approach, a cross-sectional study was conducted with 1,062 participants. Factors associated with "alcohol use with the effect of increasing the effect of crack/crack craving" were estimated by multiple regression. In the qualitative approach, 39 interviews were conducted using Bardin's content analysis technique. Results: 871 (82.0%) participants reported consuming alcohol, among them, 668 (76.7%) used alcohol combined with crack: 219 (32.8%) reported feeling an effect of reduction in paranoia and/or crack craving and 384 (57.5%) reported feeling an increase in the effect of crack and in the craving to consume the drug. This relationship was also observed in the narratives of the people who use crack, with the possibility of a cyclic effect of consumption of the two substances. Those who related alcohol use to the effect of increasing crack craving (384) were more likely to use alcohol before crack (OR: 1.81; 95%CI: 1.13–2.89); to consume more than 20 stones daily (OR: 1.48; 95%CI: 1.01–2.16); to remain in abstinence from crack for less than one month (OR: 3.20; 95%CI: 1.91–5.35); to use dependence treatment services (OR: 1.85; 95%CI: 1.26–2.71); and to commit physical violence (OR:1.67; 95%CI:1.08–2.56). Conclusion: The findings of this study indicate that the modulation of the effect of alcohol use on crack cocaine depends on the moment when the drugs are consumed, and the use of alcohol before crack consumption is associated with characteristics that suggest a greater vulnerability to patterns of harmful crack use. Even though combined use is referred to as a way of reducing the negative effects of crack, the damage of this association may be greater than its possible benefits. [ABSTRACT FROM AUTHOR]

The main purpose of this study was to investigate the association between child abuse and substance use among homeless women based on a framework of General Strain Theory, which emphasizes the strong relationship between deviant behaviors and personally experienced strain. In this study, as the strain associated with substance use, child abuse experience in the past was assessed. This research tested three hypotheses about (a) the association between physical and sexual abuse during childhood and substance use (heavy drinking, marijuana use, and crack cocaine use), (b) the mediating effect of depressive symptoms, and (c) the moderating effect of positive social supports on the relationship between abuse during childhood and substance use with a survey and interview data of a randomly selected sample of 445 homeless women in a temporary shelter setting in Los Angeles County between June 2007 and March 2008. Although the results indicated that abuse during childhood was not significantly associated with any form of substance use, the results of multivariate analyses indicated that depressive symptoms fully mediated the four relationships (p <.01; physical abuse and heavy drinking, physical abuse and crack cocaine use, sexual abuse and heavy drinking, and sexual abuse and crack cocaine use). The results of this study also indicated that positive social supports significantly moderate the effect of physical (p <.01) and sexual (p <.05) abuse experience on heavy drinking, which implies that positive social supports would be significant to reduce substance use among homeless women who had a history of physical and sexual abuse during childhood. [ABSTRACT FROM AUTHOR]

Background/Aim: The aim of the present study was to investigate the biological effects of subacute crack cocaine exposure in rat liver. Material and Methods: A total of 32 rats were distributed into four groups (n=8): Experimental group 1 (G1) and Experimental group 2 (G2): rats received 18 mg/kg of body weight (b.w) of crack cocaine for 5 days, once a day, group G2 remained 72 h without exposure after the experimental period (5 days)(abstinence); Experimental group 3 (G3): rats received 36 mg/kg of body weight (b.w) of crack cocaine for 5 days, once a day; Control Group (CTRL): rats received only the vehicle (DMSO) administered by the intraperitoneal (i.p) route for 5 days, once a day. Results: All groups exposed to crack cocaine had an increase in the number of micronucleated hepatocytes and binucleated cells only in the highest tested dose (36 mg/kg). Karyolysis had an increase in the 18 mg/kg dose, in the abstinence group (G2), and 36 mg/kg group (G3); whereas pyknotic nuclei had an increase in the G2 group. The group exposed to 18 mg/kg of crack cocaine also showed high 8 OHdG expression. The p-NF-ĸB p65 protein decreased in the groups exposed to crack cocaine at doses of 18 and 36 mg/kg, as well as in the abstinence group. MyD88 was also found decreased in the group exposed to crack cocaine at 18 mg/kg. Conclusion: Crack cocaine inhibited toll like signaling pathway whilst being associated with genomic instability in rat liver cells. [ABSTRACT FROM AUTHOR]

The increasing oceanic uptake is a direct response to the increasing atmospheric burden of CO2. Oceans are experiencing both physical and biogeochemical changes. This increase in CO2 hosts in oceans promotes changes in pH and seawater chemistry that can modify the speciation of compounds, largely due to dependent element speciation on physicochemical parameters (salinity, pH, and redox potential). So, ocean acidification can trigger enhanced toxicity of illicit drugs to non-target marine organisms due to the combined effects of crack cocaine and low pH (from 8.3 to 7.0 pH values) on the reproduction of the marine mussel Perna perna. Fertilization rate and embryo–larval development were used as endpoints to assess the effects of crack-cocaine concentrations (6.25, 12.5, 25, 50, and 100 mg L−1) and its association with pH values variation (8.3, 8.0, 7.5, and 7.0). The IC50 was calculated from the results of an embryo–larval assay in different methods of acidification (CO2 and HCl), which evidenced that HCl treatment was more toxic than CO2 treatment for the same drug concentrations. Results showed that the gametes of P. perna react to acidification when exposed to crack-cocaine concentration and pH reductions.

Background and objectives: Epidemiological studies show that the use of cannabis is related to the use of other illicit drugs, including stimulants such as cocaine and ecstasy. However, few studies have examined how patterns of cannabis use relate to the use of stimulants. In this research we determined relationships between patterns of cannabis use and recent stimulant use, drawing on data from two large nationally representative surveys. We also explored how frequency of cannabis use relates to stimulant use and whether subjects with a cannabis use disorder (CUD)–defined as cannabis abuse or dependence–are more likely to be recent users of cocaine or ecstasy. Materials and methods: We analysed data from Ireland's 2010/11 and 2014/15 National Drug Prevalence Surveys,which recruited 5,134 and 7,005 individuals respectively, aged 15 years and over, living in private households. We included only those people who reported some past cannabis use. Multivariable logistic regression analysis was used to examine associations between patterns of cannabis use and recent stimulant use. Results: Among survey participants who had used cannabis in the last month, 17.9% reported recent cocaine use, while almost one-quarter (23.6%) reported recent ecstasy use. There was a significant linear relationship between patterns of cannabis use and recent use of cocaine, ecstasy or any stimulant, with last month cannabis users displaying greater odds (OR = 12.03, 95% CI: 8.15–17.78) of having recent stimulant use compared to last year (OR = 4.48, 95% CI: 2.91–6.91) and former (reference) cannabis users. Greater frequency of cannabis use in the last 30 days was also significantly related to the use of stimulants. In addition, results demonstrated an association between CUD and recent use of cocaine or ecstasy (OR = 2.28, 95% CI: 1.55–3.35). Conclusions: Findings from this study suggest a relationship between patterns and frequency of cannabis use and recent use of stimulants and an association between CUD and stimulant use. As the use of cannabis with stimulants may increase the risk of negative health consequences, education in community and medical settings about polydrug use and its increased risks may be warranted. [ABSTRACT FROM AUTHOR]

Past investigations utilizing diffusion tensor imaging (DTI) have demonstrated that cocaine use disorder (CUD) yields white matter changes, primarily in the corpus callosum. By applying Bayesian model averaging using multiple linear regression in DTI, we demonstrate there may exist relationships between the impaired white matter and glutamic acid decarboxylase (GAD) polymorphisms. This work explored the two-way and three-way interactions between GAD1a (SNP: rs1978340) and GAD1b (SNP: rs769390) polymorphisms and years of cocaine use (YCU). GAD1a was associated with more frontal white matter changes on its own but GAD1b was associated with more midbrain and cerebellar changes as well as a greater increase in white matter changes in the context of chronic cocaine use. The three-way interaction GAD1a|GAD1b|YCU appeared to be roughly an average of the polymorphism two-way interactions GAD1a|YCU and GAD1b|YCU. The three-way interaction demonstrated multiple regions including corpus callosum which featured fewer significant voxel changes, perhaps suggesting a small protective effect of having both polymorphisms on corpus callosum and cerebellar peduncle. [ABSTRACT FROM AUTHOR]

Background and aims: Recent reports have highlighted the emergence of 'wasp dope' as an issue of concern, but epidemiological evidence is lacking. Wasp dope is a crystalline substance created by electrifying pyrethroid‐containing insecticides (e.g. wasp sprays) that may give users a methamphetamine‐like 'rush'. This paper describes wasp dope use and correlates of use in a sample of people who use drugs (PWUD) in Appalachian Kentucky, a region that has been an epicenter of opioid use and related harms in the United States. Methods: Respondent‐driven sampling and targeted street outreach were used to recruit PWUD. Eligibility criteria included being aged at least 18 years, residing in one of five Appalachian Kentucky counties, and having either used opioids or injected any drug to get high in the prior 30 days. Interviewer‐administered surveys queried participants' (n = 278) recent (past 6 months) wasp dope use, other substance use and demographic characteristics. Prevalence ratios (PR) were estimated using generalized estimating equations assuming a Poisson outcome distribution in a cross‐sectional analysis. Results: Recent wasp dope use was reported by 16.1% of participants. Men and people who recently experienced homelessness and transportation difficulties were twice or more as likely to have used wasp dope compared with their counterparts [PR = 2.08, 95% confidence interval (CI) = 1.11, 3.87, PR = 2.78, 95% CI = 1.64, 4.72 and PR = 2.01, 95% CI = 1.06–3.81, respectively]. While wasp dope use was associated with injection drug use and using opioids and other substances to get high in unadjusted analyses, the factor most strongly associated with wasp dope use was methamphetamine use (PR = 17.23, 95% CI = 2.57, 115.61), specifically methamphetamine injection (PR = 4.47, 95% CI = 1.56, 12.78). Conclusions: Among people who use drugs in rural Kentucky, USA, more than one in six people surveyed reported using wasp dope in the past 6 months, nearing the percentage using cocaine/crack (20%) and fentanyl/carfentanil (25%). Wasp dope use was higher among men and strongly associated with homelessness, transportation access, methamphetamine use and injection drug use. [ABSTRACT FROM AUTHOR]

Background: Veterans with substance use problems have rates of partner and non-partner violence that typically exceed the general population. Sleep problems may exacerbate violence and maintain addictive behaviors in non-veterans, but requires study in veterans. Therefore, we examine the interrelationships between substance use, insomnia, and violence in veterans.Methods: Veterans (N = 762) screened for a randomized controlled trial at veterans affairs mental health and substance use clinics. Participants completed modified Conflict Tactics Scales to quantify past-year violence and the Insomnia Symptom Questionnaire to assess sleep disturbance. We evaluated associations between substance use and sleep in predicting the target of aggression (partner or non-partner) and degree of violence (aggression or injury) using binomial logistic regressions.Results: Half of participants endorsed symptoms suggestive of insomnia, 23.2% endorsed physical aggression toward partners (PA-P) and 33.9% non-partners (PA-NP), and 9.7% endorsed physical injury of partners (PI-P) and 17.6% of non-partners (PI-NP). Regressions revealed significant models for PA-P, PA-NP, and PI-NP, whereas the PI-P model was not significant. PA-P was higher among non-Caucasian race and older veterans. PA-NP was more common in those with insomnia and increased with frequency of cocaine use. Insomnia moderated the relationship between cocaine use and PA-NP; there was a weaker relationship between cocaine use and PA-NP in those with insomnia. PI-NP was more common with higher frequency of alcohol and cocaine use, and in those with insomnia.Conclusions: This study finds sleep disturbances are meaningful predictors of violence among veterans with differential relationships with aggression severity, victims, and substance use concurrence. [ABSTRACT FROM AUTHOR]

Background: Despite the advance in studies addressing the use of crack cocaine, knowledge about the characteristics of users that seek treatment in the different modalities of care for substance use disorders is important to plan the operationalization of these services. Objective: To analyze the prevalence and factors associated with the use of crack cocaine in outpatients. Method: Cross-sectional study consisting in the analysis of the medical records of outpatients of a chemical dependency clinic located in the south of Brazil from 1999 to 2015. The Fisher's exact test and the Poisson regression model were used to analyze the data. Results: Medical records from 1,253 patients were analyzed, and 1,196 (95.5%) of them contained information on the use of crack cocaine. Use of this substance was reported by 47% (95% CI [44, 50]) of the outpatients. The risk group was composed of adults aged 20-39 years, with no income, who had three or more children, did not consume alcohol or marijuana, had continuous family assistance, spontaneously looked for the service, and had already been hospitalized or assisted at a therapeutic community or psychosocial center. Conclusion: There is great demand for the outpatient care of crack cocaine users. It is crucial that the risk factors guide treatment planning. [ABSTRACT FROM AUTHOR]

The aim of this study was to evaluate the analytical performance of the Kite Biotechnology Oral fluid (OF) screening test device, which is used for roadside screening of cannabis, opiates, amphetamines, methamphetamine, 3,4-methylenedioxymethamphetamine (MDMA), cocaine and benzodiazepines by comparing samples with matched plasma samples, analysed via liquid chromatography–tandem mass spectrometry (LC-MS/MS) for confirmation. OF and plasma samples were obtained simultaneously from a total of 100 subjects. OF samples were analysed by OF screening test based on immunochromatography. The OF screening test cut-off values were 50 ng/mL for amphetamines (d -amphetamine) and methamphetamine/MDMA (d -methamphetamine), 30 ng/mL for cocaine (benzoylecgonine), 40 ng/mL for opiates (morphine), 20 ng/mL for benzodiazepines (nordazepam), and 25 ng/mL for cannabis (Δ9-tetrahydrocannabinol). LC-MS/MS method validation was performed according to the CLSI C62-A recommendations with the following parameters: matrix effect, lower limit of quantification (LLOQ), linearity, intra-day and inter-day precision and accuracy. The overall specificity, accuracy and negative predictive values (NPV) were acceptable and met the DRUID standard of >80%. The OF screening test device showed good sensitivity for cocaine, amphetamines and opiates, whereas it indicated poor sensitivity for methamphetamine/MDMA (66.7%) and failed to detect cannabis and benzodiazepines. The present study is the first report to evaluate the Kite Biotechnology OF screening test device. The diagnostic performance of the OF screening test device was acceptable for opiates, cocaine and amphetamines, but it was insufficient for methamphetamine/MDMA, benzodiazepines and cannabis because of sensitivity issues. [ABSTRACT FROM AUTHOR]

Copyright of Saúde e Sociedade is the property of Universidade de Sao Paulo, Faculdade de Saude Publica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of SMAD Revista Electronica Salud Mental, Alcohol y Drogas is the property of Universidade de Sao Paulo, Escola de Enfermagem de Ribeirao Preto and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: Data suggest that there were disparities in H1N1 vaccine uptake, and these may inform COVID-19 vaccination efforts. We conducted a systematic review to evaluate disparities in H1N1 vaccine uptake, factors contributing to disparities, and interventions to reduce them.Methods: We searched English-language articles in MEDLINE ALL, PsycINFO, Cochrane Database of Systematic Reviews, and Cochrane Central Register of Controlled Trials from database inception through May 8, 2020. Observational studies examining H1N1 vaccine uptake by race/ethnicity, socioeconomic status, rurality, and disability status in US settings were included. Two reviewers independently assessed study eligibility. Single-reviewer data abstraction was confirmed by a second reviewer. We conducted independent dual quality assessment, and collective strength of evidence assessment.Results: We included 21 studies. African American/Black, Latino, and low-socioeconomic status participants had disproportionately lower H1N1 vaccination rates (low- to moderate-strength evidence). However, Latinos were more likely than Whites to intend to be vaccinated, and African American/Blacks and participants with lower-socioeconomic status were just as likely to intend to be vaccinated as their White and higher-socioeconomic status counterparts (low-strength evidence). Vaccine uptake for other groups has been insufficiently studied. Factors potentially contributing to disparities in vaccine uptake included barriers to vaccine access, inadequate information, and concerns about vaccine safety and efficacy. Studies were largely cross-sectional. Many of the studies are a decade old and were conducted in the context of a different pandemic. The categorization of racial and ethnic groups was not consistent across studies and not all groups were well-studied.Discussion: Efforts to avoid disparities in COVID-19 vaccination uptake should prioritize vaccine accessibility and convenience in African American/Black, Latino, and low-SES communities; engage trusted stakeholders to share vaccine information; and address concerns about vaccine safety and efficacy.Primary Funding Source: Department of Veterans Affairs, Veterans Health Administration, Health Services Research & Development.Protocol Registration: PROSPERO CRD42020187078. [ABSTRACT FROM AUTHOR]

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Several studies have demonstrated that ACh modulates the dopaminergic circuit in the nucleus accumbens, and its blockade appears to be associated with the inhibition of the reinforced effect or the increase in dopamine caused by cocaine use. The objective of this study was to evaluate the effect of biperiden (a muscarinic receptor antagonist with a relatively higher affinity for the M1 receptor) on crack/cocaine use relapse compared to a control group that received placebo. This study is a double-blind, randomized, placebo-controlled clinical trial. The intervention group received 2 mg of biperiden, 3 times a day, for a period of 3 months. The control group received identical placebo capsules, at the same frequency and over the same period. All participants were followed for a period of six months. The sample comprised 128 people, with 61 in the control group and 67 in the biperiden group. Lower substance consumption was observed in the group that received biperiden treatment two (bT2 = −2.2 [−3.3; −1.0], p < 0.001) and six months (bT4 = −6, 2 [−8.6; −3.9], p < 0.001) after the beginning of the intervention. The biperiden group had a higher latency until a possible first day of consumption, in the same evaluation periods (bT2 = 0.26 [0.080; 0.44], p = 0.004; bT4 = 0.63 [0.32; 0.93], p < 0.001). Despite the major limitations of the present study, the group that received biperiden reduced the number of days of cocaine/crack use and showed an increase in the latency time for relapse. More studies are needed to confirm the utility of this approach. • The cholinergic system impacts reward mechanisms, acetylcholine may play an important role in the cocaine addiction process. • Biperiden reduced the number of days the participants consumed cocaine/crack and increased the latency of consumption. • Biperiden, an antagonist of the cholinergic system, may serve as an alternative treatment for cocaine/crack addiction. [ABSTRACT FROM AUTHOR]