An activist trying to get Canada to broaden its medical marijuana law lit up a joint on the floor of Parliament on Monday, with lawmakers looking on, CTV television reported.
Samuel Mellace took seven or eight puffs before security whisked him away.
About 4000 Canadians are able to smoke medical marijuana. But Mellace said he wanted them to be able to buy products derived from marijuana such as creams or biscuits.
"My wife can't smoke her medication because she has lung cancer, so I make the butter and smoothies," Mellace explained. "It's ridiculous to think that I could go to jail for easing my wife's suffering."
Conservative Prime Minister Stephen Harper, in power since 2006, backs a zero-tolerance policy on illegal drugs.