查看文章

Research letter tion drug use reported during the 30 days before assessment decreased significantly in the total sample between 2001 and 2005, from 84.5% to 63.7%(p< 0.001). Our data provide evidence that suggests that heroin use has become an increasingly marginal form of drug use among illicit opioid users in Canada, particularly outside of Vancouver and Montréal (port cities that are major heroin import points). Instead, the use of prescription opioids in varying forms has become the predominant form of illicit opioid use. Recent data from the United States have indicated similar