BACKGROUND
Opium and its derivatives are widely abused throughout the world. Recent case reports and a few limited studies have suggested that opiates cause dilation of the common bile duct of the abusers.
MATERIAL/METHODS
Our case-control study, lasting 7.5 months, investigated 121 male adult addicts and 142 non-addicted controls for biliary tract diameters, using ultrasonography. The study ...