Call me an old bastard [OK, you're an old bastard], but what is DXM? Like a downer? I've heard [& used to do] of cough medicine Terpin Hydrate & Codeine that as kids we used to drink, but someone 21+ has to sign for it, & you'd get a nice opiate high from it [plus a little queasy], but drinking Robitussin is new to me.