Opinion: Cash from cannabis companies creates conflicted researchers

Imagine that scientists charged with doing research on tobacco’s health implications were funded by tobacco companies. (In fact, the tobacco industry used this tactic for decades to cast doubt on the adverse health effects of smoking.) But today it would be an outrageous conflict of interest — research on addictive drugs shouldn’t be paid for by people who stand to profit from selling them. Yet this is exactly what is happening with cannabis.

Contrary to common belief, cannabis is an addictive drug with several harmful psychological and physiological effects. As is the case with every such drug, not all people who use it become addicted to it. In fact, most don’t. But it does lead to addiction in a subset of people. Cannabis use disorder is a diagnosable condition that is estimated to affect around 4 million people in the United States, or around 10% of users. It’s a similar story in Canada, where about 1.3% of the population have cannabis use disorder.

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