Heroin has plagued Yekaterinburg, Russia's fifth-largest city (pop 1.3m), for more than a decade.
Campaigners believe it has caused about 50,000 deaths since 1999 in the Urals city and surrounding Sverdlovsk Region (total pop 4.5m).
Officially, 80,000 people die in Russia annually from drug-related causes.
Drug-Free City is a private Yekaterinburg fund campaigning for tougher action against the heroin trade and providing rehab centres outside the city which offer a “cold turkey” cure.