A drug mystery in South Africa

The BBC and other sources have reported that some South Africans have taken to stealing an antiretroviral HIV medication, and using it as a street drug. That may or may not be true. But the drug in question, efavirenz, is known for producing temporary side-effects that can include altered dreams and mild hallucinations. And that's really weird, writes scientist-blogger Neuroskeptic, because, so far, nobody understands the chemical mechanism that could connect efavirenz to those sort of symptoms—either in legitimate users, or illegal ones.
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