my first dose i was prolly like 120 lbs and did 8 cc's (240mg) but im not suprised u didnt feel anything from what you took, my experience with cough medicine is that it doesnt get you very high unless you take a ton of it or take it with pills that got dxm in them, if u get high on dxm you'll know it whether you like the feeling or not its prty easy to tell ur fucked up