[Prevalence of the use of old and new drugs among new entrants in Italian prisons]. / "Prevalenza" di uso di vecchie e nuove droghe nei nuovi ingressi in strutture penitenziarie italiane.

An epidemiological survey was conducted to evaluate the prevalence of drug use among new entrants in Italian prisons. Overall, 1267 inmates were recruited by 9 prisons. Drug use before imprisonment was reported by 55.8% of the participants. Cocaine was the most commonly used drug (42%), followed by heroin (34%), marijuana/cannabis (33%), ecstasy (7%), hallucinogens (6%), amphetamines (5%); more than one drug was reported by 68% of abusers. Recent use (1 month before imprisonment) was admitted by up to 27% of inmates. Alcohol or tobacco use was reported by 38 and 77% of the inmates, respectively. Our findings indicate that a high proportion of inmates has ever used drugs; adequate intervention is needed to reduce the risk of addictive behaviour in this population group.