Why do people who smoke heroin not switch to injecting? Risk perception, social norms, context

What is it about?

Injecting drug use carries substantially greater health risks than smoking or other non-injecting routes of administration, including higher rates of blood-borne virus transmission, vein damage and overdose. Yet not all people who use heroin transition to injecting, and relatively little qualitative research had explored why some people who smoke heroin resist that transition. This qualitative study recruited people who smoke heroin and examined their perceptions of injecting, their reasons for not transitioning to injection, and the social and contextual factors that shaped their decisions. Themes identified included risk perception, changing social norms around injecting within their social networks, and the role of place and social context in maintaining non-injecting routes of use. The study was conducted in a Northern Irish context, where patterns of heroin use and associated social dynamics differ from urban centres in Britain.

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Why is it important?

Preventing transition to injecting drug use is a high-value harm reduction target, as it substantially reduces exposure to blood-borne viruses, overdose risk and other injection-related harms. Understanding what protective factors delay or prevent this transition at the individual and social level has direct implications for peer education, outreach services and harm reduction messaging. The finding that changing social norms around injecting within peer networks act as a protective factor points to the value of supporting those norms through community-level harm reduction approaches. The Northern Irish context adds specificity that is often absent from the broader literature, given that patterns of heroin use, route of administration and social context in Northern Ireland differ meaningfully from those documented in larger urban settings in England and Scotland.