Canadian government study shows big rise in Canadian use of several narcotics.
D002170:Canada; D003061:Codeine; D004363:Drug Utilization; D006801:Humans; D006853:Hydrocodone; D008614:Meperidine; D009020:Morphine; D009294:Narcotics; D010098:Oxycodone
D009294:Narcotics; D006853:Hydrocodone; D009020:Morphine; D008614:Meperidine; D010098:Oxycodone; D003061:Codeine