Been researching DXM a good bit and went and got some Robitussin Cough. Yes, it only contains DXM.(15 mg per 5 ml tsp) Anyways checked Erowid for some dosage info and it said 100-200 mg was a light dose and 200-400 mg was a common dose andwhat not. So never taken DXM before I just drank about 270 mg worth of Robo. I guess this is a kinda high dose for fist time? Not feeling shit. Not trying to dick size, just want help. Through my readings it has said to not drink alot your first time so I don't really think drinking more is a good idea as I have passed the "common" dose. I'm looking to get high, suggestions anyone?