Why would you drink the cough syrup? They have robotussin gels that have 15mg of dxm a piece. DXM is the only active ingredient. And yes, I have fallen asleep on dxm and awoke to not knowing where the hell I was at, and I couldnt move from the ground. Its fun sometimes though. Me and my buddy drank half a liter of jack each, and ended up getting some while we were looking for a movie at wal mart. I ended up tripping like I was on pcp or something, All I wanted to do was kill this one guy..It felt pretty neat though.