Medical marijuana: Close up of buds on marijuana plants in a very large commercial grow house

More potent than old-school pot, today’s cannabis has led to poisoning in youth

In his junior year of high school, an older boyfriend of Ethan Andrew’s sister introduced him to high-potency cannabis. The Colorado high schooler started regularly experimenting with that drug, legalized for adult Coloradans’ recreational use in 2012. He relied on it to sleep and get through his day. He didn’t expect its adverse effects on him.