"long lasting" implies time-release, which is less than ideal for tripping. I could be wrong, maybe they are just like those breath strips... Either way, I encourage extreme caution when using anything like DXM.
Buck268 Reviewed by Buck268 on . TheraFlu Are these any good for a dxm trip ? http://www.walgreens.com/store/product.jhtml?id=prod1160698&CATID=301460&navAction=push&navCount=0 Active Ingredients Dextromethorphan in each Strip - 11 mg - Equivalent to 15 mg Dextromethorphan HBr Looks good to me Rating: 5