Background: The costs of combination antiretroviral therapy (cART) for HIV, consisting of separate, particularly generic, components (multiple-tablet regimens, MTR) are generally much lower than those of single-tablet regimens (STR) comprising the same active ingredients., Objectives: To assess whether patients would be willing to take MTR, once-daily, instead of STR, with the goal of reducing general healthcare costs. In addition, we aimed to examine whether willingness was associated with particular patient characteristics., Methods: Data from the ATHENA cohort database in The Netherlands of adult HIV-1-infected patients in care and taking cART ≥6 months were used to select 1000 potential participants for an online patient survey on patient preferences and satisfaction. Participants were asked whether they would be willing to take three pills with the equivalent active ingredients simultaneously instead of STR to reduce costs. Multivariate logistic regression was used to examine associations between patient characteristics and willingness to take MTR instead of STR., Results: Forty-seven percent ( n = 152) of the 322 respondents answered 'yes' and 26 % ( n = 83) answered 'maybe' when asked whether they would be willing to take three pills with the equivalent active ingredients simultaneously to reduce costs. Non-Dutch patients were significantly more likely to answer 'no' (OR: 2.49; 95 % CI: 1.17-5.30) or 'maybe' (OR: 2.63; 95 % CI: 1.24-5.60). Answering 'no' was less common among patients who had been taking cART ≥15 years (OR: 0.23; 95 % CI: 0.09-0.58). Commonly reported concerns included the dosing frequency, efficacy and tolerability of MTR., Conclusions: HIV-infected patients do not necessarily oppose the decision to prescribe MTR instead of STR to reduce healthcare costs. However, the potential trade-off in terms of convenience should be carefully weighed against the projected savings., Competing Interests: Compliance with Ethical StandardsEthical ApprovalThis study was exempted from written informed consent (by the Medical Ethics Review Committee of the Academic Medical Centre of the University of Amsterdam). All patients were informed about the study and we considered consent implicit when a survey was returned to us. Patients who had opted out of registration in the ATHENA cohort were not included.Conflict of interestSCJMV has received travel grants from Abbvie and Gilead. PJS through his institution has received grants from (the former) Abbott Laboratories and Gilead Sciences. PR through his institution has received independent scientific grant support from Gilead Sciences, Janssen Pharmaceuticals Inc, Merck & Co, Bristol-Myers Squibb and ViiV Healthcare; he has served on a scientific advisory board for Gilead Sciences; he serves on a data safety monitoring committee for Janssen Pharmaceuticals Inc; and chaired a scientific symposium by ViiV Healthcare, for which his institution has received remuneration. KB serves on advisory boards for MSD, Gilead, BMS, Viiv and Janssen, for which he has received remuneration. The authors EANE, CS, PTN, FPK and SEG declare that they have no conflicts of interest.FundingThis research was supported by Aids Fonds (grant number: 2011015). The ATHENA database is maintained by Stichting HIV Monitoring and supported by a grant from the Dutch Ministry of Health, Welfare, and Sport through the Centre for Infectious Disease Control of the National Institute for Public Health and the Environment.Coordinating CentreDirector: P. Reiss. Data analysis: D.O. Bezemer, A.I. van Sighem, C. Smit, F.W.M.N. Wit, T.S. Boender. Data management and quality control: S. Zaheri, M. Hillebregt, A. de Jong. Data monitoring: D. Bergsma, P. Hoekstra, A. de Lang, S. Grivell, A. Jansen, M.J. Rademaker, M. Raethke, R. Meijering, S. Schnörr. Data collection: L. de Groot, M. van den Akker, Y. Bakker, E. Claessen, A. El Berkaoui, J. Koops, E. Kruijne, C. Lodewijk, L. Munjishvili, B. Peeck, C. Ree, R. Regtop, Y. Ruijs, T. Rutkens, L. van de Sande, M. Schoorl, A. Timmerman, E. Tuijn, L. Veenenberg, S. van der Vliet, A. Wisse, T. Woudstra. Patient registration: B. Tuk.