It is official (almost) that marijuana smoke is carcinogenic

California EPA has issued a draft study indicating that there is some evidence from studies in humans that marijuana smoke is associated with increased cancer risk. Studies in animals also provide some evidence that marijuana smoke induces tumors, with benign and malignant tumors observed in rats exposed via inhalation, malignant tumors in rats exposed via subcutaneous injection as newborns, and benign tumors in mice exposed dermally. Studies investigating the genotoxicity, immunotoxicity, and effects on endocrine function and cell signaling pathways provide additional evidence for the carcinogenicity of marijuana smoke. Finally, the similarities in chemical composition and in toxicological activity between marijuana smoke and tobacco smoke, and the presence of numerous carcinogens in marijuana (and tobacco) smoke, provide additional evidence of carcinogenicity.

This study is the initial step in the process of listing marijuana smoke as a Prop 65 chemical due to its carcinogenicity. Tobacco smoke is already on the Prop 65 list.

2 responses to “It is official (almost) that marijuana smoke is carcinogenic

  1. So does this mean I can sue my drug dealer, the Drug Lords and drug gangs for my cancer the way others have sued the tabacco firms? This is the next commercial for all those mesothelioma law firms.

  2. Well Jim – you can definitely sue your drug dealer for not having a Prop 65 warning label on the pouch containing the said marijuana. :-)

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