DXM is a very powerfull dissassociative anestetic, DO NOT DO IT ALONE RESULTS SUCK BALLS!! You tweak out and have a very bad trip. 165 lbs. hmmm drink a 4 oz. bottle of Robbutussin Max Strength that will make you trip but be around people you know and trust. Yeah my first time Dexing man that was great till the end. 900 mgs. Intense thats all I'll say. And Dutchmaster's right don't abuse it. Have fun...Peace