Smith became involved with heroin use in the late 1970s.

Heroin use has increased despite efforts of law enforcement and community groups working to fight the problem.

Heroin use is on the rise around the city and across the country, law enforcement officials say.

On the other hand, you imply that maybe heroin use is not so bad after all.

Officials in both cities consider heroin use at epidemic levels.

Evidence of widespread heroin use in the community built up rapidly during 1983-4.

Heroin use by teenagers does not yet amount to a national epidemic.

Of those, five have relapsed into heroin use, the officials said.

As their heroin use continued, it was generally the case that consumption increased.

But he returned to heroin use within days after rejoining his wife.