174 mg is nothing,buy some Delsym...
RedRainDrop Reviewed by RedRainDrop on . how long does it take for dxm to kick in I ate around 4 hours ago, I downed 2 ounces of 15 mg syrup (~174 mg dxm, aiming for first plateau, this being my first attempt) 45 minutes ago and I'm not feeling anything. How long does this stuff usually take to start working? Rating: 5