Overdose deaths are a manor contributor to excess mortality among hero
in users. It has been proposed that opioid overdose morbidity and mort
ality could be reduced substantially by distributing the opioid antago
nist naloxone to heroin users. The ethical issues raised by this propo
sal are evaluated from a utilitarian perspective. The potential advant
ages of naloxone distribution include the increased chance of comatose
opioid users being quickly resuscitated by others present at the time
of an overdose, naloxone's safety and its lack of abuse potential. Th
e main problems raised by the proposal are: the medico-legal complicat
ions of medical practitioners prescribing a drug that is most likely t
o be administered to and by people other than the one for whom it is p
rescribed; the economic costs of distributing naloxone sufficiently wi
dely to have an impact on overdose morbidity and mortality; and the po
tentially greater cost-effectiveness of simpler educational interventi
ons. Given the possible benefits of naloxone distribution, it may be w
orthwhile considering a controlled trial of naloxone distribution to h
igh-risk heroin users.