Quantitative indicators and field reports continue to suggest an increasing incidence of new users (snorters) in the younger age groups, often among women. One concern is that young heroin snorters may shift to needle injecting, because of increased tolerance, nasal soreness, or declining or unreliable purity. Injection use would place them at increased risk of contracting HIV/AIDS.

In some areas, such as Boston and San Francisco, the recent initiates increasingly include members of the middle class. In Newark, heroin users are usually found in suburban populations.

National Household Survey on Drug Abuse (NHSDA)

The 1996 NHSDA shows a significant increase from 1993 in the estimated number of current (once in the past month) heroin users. The estimates have risen from 68,000 in 1993 to 216,000 in 1996.

Among individuals who had ever used heroin in their lives, the proportion who had ever smoked, sniffed, or snorted heroin increased from 55 percent in 1994 to 82 percent in 1996. During the same period, the proportion of users who injected heroin remained about the same, at about 50 percent.