Retrospective cross-sectional study of the evolution of the use of pharmacological opioids and heroin in a population group in the Barcelona area.

Background: Opioid dependence is causing an epidemic in the US, but unlike the 1970s it seems more related to prescription opioids than heroin.

Objectives: The objective of this study is to assess whether this new epidemic has already reached our environment and to see if there are changes in consumption and in the characteristics of consumers.

Patients And Methods: Retrospective cross-sectional study.