Just listen to me, I'm an expert.
If you get a prescription, get codimal or hydrobit.. you can drink a swig or two and get FUCKED UP. Usually, they mix the codeine with shit that will make you sleep, though, so be careful.
If you want to get over the counter shit that'll make you trip balls, go to CVS and get something with ONLY dextromethorphan in it. Almost all cough syrup has that in there but not as the only ingredient. However, at CVS, they have some, and almost all the "gels" you find will have that as the only ingredient. I weigh 120 lbs so half a bottle makes me trip.
__________________
|