The most widely used illicit drug in North American and Europe is most likely:

Name: The most widely used illicit drug in North American and Europe is most likely:
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Quizplus · Accepted Answer

Marijuana is the most widely used illicit drug in North American and Europe, with an estimated 192 million users globally in 2018. Heroin and methadone are opioids, which are highly addictive and often abused, but they are not as widely used as marijuana. Valium is a prescription medication, not an illicit drug.

The Most Widely Used Illicit Drug in North American and Europe