Implementation and evaluation of a syringe vending machine trial in Tbilisi, Georgia

•It is feasible to implement Syringe vending machines (SVM) in existing harm reduction facilities in Tbilisi, Georgia.•SVM improve access to sterile injection equipment for people who inject drugs.•A sense of ownership and motivation among staff are important for the quality of adherence to the SVM operational protocol. Syringe vending machines (SVM) have proven to be an effective vehicle for providing an uninterrupted supply of sterile equipment to PWID, but they have not been implemented or disseminated broadly. The aim of this study was to implement and evaluate outcomes of introducing SVM in Tbilisi, Georgia. We installed SVM at five HIV prevention sites in 10 locations in Tbilisi, Georgia and studied implementation over 20 months. We used the RE-AIM framework to assess outcomes across four RE-AIM domains: reach, effectiveness at providing syringe access, adoption and implementation. Reach. SVM reached 8% of the target population. Effectiveness at Providing Syringe Access. SVM dispensed 14% of all syringes distributed by HIV prevention services. Using SVM was associated with PWID receiving more sterile syringes from HIV prevention outlets. Adoption. All HIV prevention sites (N=5) invited to implement SVM agreed to participate. Sixty one percent of PWID who received SVM access cards used SVM at least once. Women and young PWID were more likely to use SVM compared to other PWID. Implementation. At some sites adherence of the outreach staff to the operational protocol was suboptimal. SVM are an acceptable, feasible and effective intervention for improving access to sterile injection equipment for PWID. Future research will need to elaborate approaches to build the sense of ownership and improve motivation of the field staff to engage with the new intervention, and to examine strategies for attracting groups of PWID who are not in contact with prevention and treatment services.