It’s ridiculous to claim that smoking marijuana is a healthy habit. It does increase the risk of certain kinds of cancers, although the numbers are not huge, they’re also not zero. Jacob Sullum says “Marijuana Kills! But Not Very Often. Especially When Compared to Alcohol and Tobacco.“
In a new Heritage Foundation video, anti-pot activist Kevin Sabet bravely tackles “the myth that marijuana doesn’t kill.” Although cannabis consumers (unlike drinkers) do not die from acute overdoses, he says, “marijuana does kill people” through suicide, chronic obstructive pulmonary disease, car crashes, and other accidents.
I won’t say Sabet is attacking a straw man, since overenthusiastic cannabis fans have been known to say that “marijuana doesn’t kill anyone” (although the top Google result for that phrase is an article by Sabet explaining why that’s not true). But I will say that Sabet manages to obscure the fact that marijuana does not kill people very often, especially compared to the death tolls from legal drugs such as tobacco and alcohol, which is the relevant point in evaluating the scientific basis for pot prohibition. Let’s take a closer look at the four ways that marijuana kills, according to Sabet:
Suicide. Some research does find a correlation between suicide and marijuana use, but that does not mean the relationship is causal. A longitudinal study published by The British Journal of Psychiatry in 2009 reached this conclusion:
Although there was a strong association between cannabis use and suicide, this was explained by markers of psychological and behavioural problems. These results suggest that cannabis use is unlikely to have a strong effect on risk of completed suicide, either directly or as a consequence of mental health problems secondary to its use.
Furthermore, there is some evidence that letting patients use marijuana for symptom relief reduces the risk of suicide. Still, if reefer has ever driven anyone to kill himself, that would be enough to prove Sabet’s point. You can’t say it has never happened!
