One Tokes, The Other Doesn't

Parents and school principals are always trying to scare kids with the message that smoking pot will lead to harder drugs. Well, a study in the Journal of the American Medical Association suggests that the grownups may be on to something. By tracking 311 pairs of Australian twins (both fraternal and identical) in which one twin used marijuana before age 17 and the other did not, researchers have been able to show that early pot users are as much as five times more likely to use or abuse cocaine, heroin, hallucinogens, sedatives or alcohol.

This isn't the first study to call...

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