Aims. To examine injecting drug user (IDU) motivations as research particip
ants. Design. Convenience sampling facilitated by recruitment notices distr
ibuted through needle and syringe programmes (NSPs), and snowballing within
peer networks. Setting. NSPs in six suburbs throughout the Melbourne metro
politan area. Participants. One hundred and fifty-four current ID Us. The m
ean age was 28 years, 62% were male, and 80% nominated heroin as preferred
drug. Measurements. Interviewer-administered survey including questions abo
ut socio-demographics, drug use and main reasons for participating in resea
rch. Findings. IDU research participation reasons were consistent with moti
vational themes such as economic gain (46%), expression of citizenship (38%
), altruism (19%), personal satisfaction (17%), drug user activism (16%) an
d seeking information or assistance (5%). Most respondents (58%) cited reas
ons where the primary beneficiaries of participation were other individuals
or groups (citizenship, altruism, drug user activism) or both self and oth
ers. Conclusions. IDU motivations for research involvement appear to be mul
ti-dimensional, rarely motivated by economic gain alone, and not necessaril
y defined by direct benefits or gains to themselves. These findings are rel
evant to the question of IDU research payment ethics.