it depends on how big u are and how u react to drugs i guess, I did 300 my first time and it was a pretty good dose, it was still pretty intesne but not overwhelming, also i dunno anything about zicam but make sure its only active ingrediant is dxm
ny2casports89 Reviewed by ny2casports89 on . Zicam DXM I just bought Zicam concentrated cough mist which has 300mg of DXM in it. How strong will this be/ what kind of effects will this dosage prodce? Rating: 5