Originally Posted by lambpie

i wouldnt be so quick to assume its not a killer, the figures are always messed up because most deaths are attributed to other things..
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Marijuana smoke and cigarette smoke contain many of the same toxins, including one which has been identified as a key factor in the promotion of lung cancer. This toxin is found in the tar phase of both, and it should be noted that one joint has four times more tar than a cigarette, which means that the lungs are exposed four-fold to this toxin and others in the tar. It has been concretely established that smoking cigarettes promotes lung cancer (which causes more than 125,000 deaths in the US every year), chronic obstructive pulmonary disease (chronic bronchitis and emphysema) and increased incidence of respiratory tract infections. This implies, but does not establish, that smoking marijuana may lead to some of the same results as smoking cigarettes. It is notable that several reports indicate an unexpectedly large proportion ofmarijuana users among cases of lung cancer and cancers of the oral cavity,pharynx, and larynx. Thus, it appears that the use of marijuana as a medicine has the potential to further harm an already ill patient in the same way that taking up regular cigarette smoking would, particularly in light of the fact that those patients for whom marijuana is recommended are already poorly equipped to fight off these infections and diseases.