Why you shouldn’t dismiss the risk of marijuana addiction

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There are real concerns with marijuana addiction. That doesn’t mean legalization is a bad idea.

R.J. Sangosti/Denver Post via Getty Images

It is now widely accepted that marijuana is, at the very least, less dangerous than other recreational drugs. The typical line you’ll hear  is that “marijuana is harmless,” often meant as a justification for legalizing cannabis.

But at the Atlantic, Annie Lowrey provides a corrective to this narrative, diving into the real risks of marijuana addiction. The whole thing is worth reading, but here’s the key paragraph:

People say marijuana is harmless, largely based on their own experiences with the drug. When it comes to countering that narrative, it’s one thing for doctors or Drug Enforcement Administration (DEA) agents to claim that pot really is harmful — that can be easy to ignore. But when marijuana users themselves claim to have problems, maybe that’s worth listening to and taking seriously.

The evidence is the National Survey on Drug Use and Health (NSDUH). The most recent version, from 2016, found that about 4 million people 12 and older meet the classification for a marijuana use disorder — due to the kinds of problems that Humphreys noted. That’s nearly 11 percent of the 37.6 million people 12 and older who reportedly used marijuana in 2016.

These are real people with real problems. Lowrey follows the story of Evan, whose personal life and law career slipped as he found himself compulsively using marijuana, letting it take over his life.

As Jon Caulkins, a drug policy expert at Carnegie Mellon University, has told me, “At some level, we know that spending more than half of your waking hours intoxicated for years and years on end is not increasing the likelihood that you’ll win a Pulitzer Prize or discover the cure for cancer.”

That doesn’t mean marijuana is anywhere as dangerous as cocaine, heroin, alcohol, or smoked tobacco, all of which carry a real risk of death that pot doesn’t. But weed isn’t harmless.

It’s not clear if marijuana addiction is becoming more widespread as more states legalize pot, but the problem is certainly not getting better. Lowery, citing data from the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC), reported that the “share of adults with [a cannabis use disorder] has doubled since the early aughts.”

But some researchers argue that NSDUH is more reliable for tracking trends and changes in drug use — since, unlike NESARC, it doesn’t go through major methodological changes between waves. And while NSDUH has found that use in general and daily or near-daily use are up, the prevalence of cannabis use disorder has remained roughly flat.

The existence and risks of marijuana addiction aren’t necessarily a knock on legalization. Other addictive and much more dangerous substances, like alcohol and smoked tobacco, are legal, after all. But as the country and world move forward with legalization, addiction is a risk that’s worth keeping in mind.

The risk of addiction doesn’t necessarily mean marijuana legalization is a bad idea

When evaluating whether to legalize, the question should not be whether marijuana is harmless, but whether pot’s harms and the harms of legalizing it outweigh the harms of prohibition. It’s a cost-benefit analysis.

On the cost side, will legalization, by increasing access and potentially use, lead to more overuse and addiction to marijuana? Will it lead to more car crashes, mental health issues, and respiratory problems (all of which are problems linked to pot in the scientific research)?

On the benefit side, will legalization lead to fewer arrests over a drug that is, after all, still not that bad compared to other drugs (given that it can’t cause overdose deaths)? Will the revenue drug cartels lose from illicit marijuana make them less powerful and less able to carry out violent acts around the world? Will legalization be a boon for people who could benefit from pot medically, given its potential use as a treatment for pain, muscle stiffness, and other issues? Will a regulated market be able to tame the risks of the drug better than prohibition has, particularly by keeping it away from children?

And how will all of these potential costs and benefits balance out — a net gain or net loss?

The jury is still out on a lot of these questions. Drug policy experts caution that more years of legalization and more research into the policy’s implementation are needed before a hard conclusion can be reached.

One early concern, though, is that the most common form of legalization that states are pursuing does not adequately minimize the risks of addiction.

Currently, most of the states that have legalized have adopted a model that lets for-profit companies produce, sell, and market the drug, similar to alcohol. But these companies have a perverse incentive — because the most lucrative customers, for them, are those who use (and buy) a lot of pot, even if it’s to feed an addiction.

Some early data from Colorado, one of the first two states to legalize, speaks to this point. A 2014 study of the state’s legal pot market, conducted by the Marijuana Policy Group for the state’s Department of Revenue, found the top 29.9 percent heaviest pot users in Colorado made up 87.1 percent of the demand for the drug.

Given these statistics, to whom is the marijuana industry likely to market its product? Will the industry care much about the risk of addiction if companies profit from it?

That’s why experts caution that tougher regulations are necessary. But as Humphreys told Lowrey, that’s not really happening with marijuana: “Here, what we’ve done is we’ve copied the alcohol industry fully formed, and then on steroids with very minimal regulation. The oversight boards of some states are the industry themselves. We’ve learned enough about capitalism to know that’s very dangerous.” (Excessive drinking is linked to 88,000 deaths a year, and tobacco smoking to 480,000 to 540,000 deaths a year.)

There are also other models, besides the commercialized approach, for legalization. The government could legalize possession and gifting but not sales, as Washington, DC, has done. It could put state agencies in charge of selling pot, as some provinces in Canada are doing — which research has linked to better public health outcomes for alcohol. A RAND report, in fact, noted that there are at least a dozen alternatives to standard prohibition.

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