Enhancing motivation within a rapid opioid substitution treatment feasibility RCT: a nested qualitative study

Background Opioid substitution treatment (OST) has multiple benefits for heroin injectors and is an evidence-based major component of international treatment. The current qualitative study sought to explore participants’ attitudes to and reasons for participating in a feasibility randomised trial in primary care offering ‘same day’ OST (methadone) for injecting heroin users compared to usual care.