dxm is amazing, ive only tried a small amount of delsym (ive tripped on robo alot) but delsum has Dextromethorphan polistirex which is like synthetic dxm, its poretty much the same thing but it dosent taste like boiled sewage, its arguably the best dxm high, (i prefer it to robitussin) im like a dxm pro lol,
love it have nothing bad to say about it and i probly never will, but yeah if your going to do dxm delsym is the way to go,
also the only pill containing dxm i would recomend are robitussin gels, tripple c's will leave you puking everywhere, mucinex dm will leave you sleeping all day not wanting to move (with music its not that bad but i wouldnt recomend cause youll have to take like 20 big pills) <- i cant take pills without gagging anymore bacause ive taken so much of this, i can hardly take advil anymore,
dxm is one of the best highs ive ever had,
if you want to know dosages just ask
ive been to the 4th platue (amazing place lol, i love the elephants)