Pot is quickly becoming America's drug of choice, on track to replace alcohol, but its harms are becoming clear as well.

Dr. Smita Das often hears the same myth: You can’t get hooked on pot. And the misconception has become more widespread as a growing number of states legalize marijuana. Around half now allow ...

Operators of a city drug-treatment program say they are seeing more patients addicted to marijuana since New York legalized the sale of weed for adult recreational use. “It’s one of the stupidest ...