"Bureaucracy & Beliefs": Assessing the Barriers to Accessing Opioid Substitution Therapy by People Who Inject Drugs in Ukraine.

Despite expressed interest in treatment, Ukrainian OST-naïve PWIDs evade OST for reasons that can be addressed through changes in program-level and governmental policies and social-marketing campaigns. Voiced OST barriers can effectively inform public health and policy directives related to HIV prevention and treatment in Ukraine to improve evidence-based treatment access and availability.