OTC nighttime cold and allergy medications, as well as OTC sleep aids almost all contain one of a handful of antihistamines, such as diphenhydramine HCl or doxylamine succinate. These are the primary active ingredients responsible for the drowsiness. IME, weed increases the drowsiness effect, as does alcohol and other systemic depressants.
Beeblebrox.420 Reviewed by Beeblebrox.420 on . I freaking hate OTCs yeah i just realised that the cold medicen i took yester day was a tranqulizer instead of what ever cold thing i thught it was, Im so messed up right now.. I almost took two.. Maby i sould smoke some weed or some thing there, any thing could help.. Fuck i love dark side of the moon, why does my girl friend hate pink foyld? oh well my i pod.. :D this is messed stuff does any one know what common OTC tranqs do to you if you mix it with weed? Rating: 5