yeah, ok, diphenhydramine hcl is BENADRYL...people say you can take a box of 24 of those and trip, but it's not worth it, they will MAKE YOU FEEL LIKE SHIT...and you CAN OVERDOSE on that stuff easier than dxm...

also, the levomenthol thing is a chemical alteration, or an ANALOGUE of actual MENTHOL...kind of like dxm is an analogue from morphine...it's altered to have the same throat-numbing effects, while also being able to be swallowed....menthol is poisonous in larger amounts, so they made levomenthol so it wouldn't be as poisonous, but my guess is it's probably dangerous as well...don't fuck with that stuff....go to ECKERD if you can still find one and look for robotussing cough gels...or the eckerd brand will say MAXIMUM STRENGTH cough supressant...only DXM for an active ingredient, whatever you get...don't have any other active ingredients, they add those to the dxm to keep kids from getting high off of it...you can overdose easily on some of that stuff