Article continues below advertisementPete Davidson recently opened up about his drug addiction and how smoking weed took a toll on him. "I was a daily, all-day sorta guy," the Saturday Night Live alum shared on Power 105.1 FM's The Breakfast Club radio show on August 13.Article continues below advertisementMarijuana Had Negative Effects on Pete DavidsonSource: MEGAPete Davidson said he heard voices from marijuana. The drug started having negative impacts on him, as Davidson revealed he "got psychosis where you hear voices, and you feel like you're sitting next to yourself.