The active ingredient in old school Vick's vapor rub is s-methamphetamine, the psychologically-inactive enantiomer. I cant confirm from any personal experience (lol) but it would make sense if it had a similar effect on the lungs as Vick's vapor rub.It sounds completely false and retarded but Timon is right: no one coughs it up. It simply doesn't trigger the same reaction in your body. You also have to remember that the drug used to manufacture the meth--pseudoephedrine--was developed to aid respiration.
Meth isnt an isomer of amphetamine, they are different chemicals altogether. Meth has a methyl group attached to the nitrogen, hence the name. Apparently that makes it uptake much more readily in the brain or something, IDK I'm not a pharmacologist.AnOminous said:"Amphetamine" is basically a synonym for meth, or dextromethamphetamine or, even more specifically, dextromethamphetamine hydrochloride, like many other drugs, the free base of dex. "Amphetamine" can also refer to levoamphetamine, but this is not a recreational drug and you don't want that if you're looking for a buzz.
What youre thinking of is enantiomers, chemicals with the property that their mirror image has a different geometry (like hands, the same reason you cant put a left handed glove on your right hand). Both amphetamine and meth have this property. Dextroamphetamine is what doctors prescribe, levoamphetamine does nothing. Likewise with meth, R-meth (dextromethamphetamine) is what people get high off of, S-meth (levomethamphetamine) has no stimulant effects. However both R-meth and S-meth are bronchodilators hence why S-meth used to be in Vick's vapor rub -- and why im willing to accept the claim that meth doesnt induce coughing like pot does