I'm not convinced about cough syrup, it tastes crap. As an alternative you can order DXM powder (99% pure) from one of the many Chemical Supply companies selling "research chemicals" such as 2CE, 2CT2, 2CI and DMT, all pure, very powerful and in powder from. Only comapanies in the US sell these chemicals ans ship them world wide.

If people like hallucinogens you should try some 2CE. Be very careful with dosing, and the trip is very long and the visuals are at least as strong as acid.