Patterns of drug-related problems and the services provided to optimize drug therapy in the community pharmacy setting

Introduction: Drug-related problems (DRPs) are events or circumstances involving drug therapy that actually or potentially interferes with desired health outcomes. Objectives: To assess community pharmacists’ knowledge and practice regarding DRP-reduction services, as well as the barriers and factors associated with decreased provision of these services. Methods: This cross-sectional study utilized a validated questionnaire to assess pharmacists’ knowledge, practice, and barriers to the provision of DRP-reduction services in the community pharmacy setting. Binary regression model was used to assess the variables associated with the practice of DRP-reduction services. Results: A total of 412 pharmacists participated in the study. The pharmacists demonstrated strong knowledge but inadequate practice of DRP-reduction services. The most reported DRPs were inappropriate combination of drugs, or drugs and herbal medications, or drugs and dietary supplements (52.4%), patients’ inability to understand instructions properly (46.1%), inappropriate drug according to guidelines (43.7%), and too high dose (40.3%). The most common barriers to these services were increased workload (60.5%), limited time (53.2%), and lack of good communication skills (49.8%). The presence of a counselling area in the pharmacy increased the practice of DRP-reduction services (OR: 3.532, 95%Cl: 2.010–5.590, P