There have been many amphetamine/methamphetamine pro-drugs sold as...Rx drugs!
A few examples: amfecloral, benzphetamine, clobenzorex, famprofazone, fencamine, fenethylline, fenproporex, furfenorex, mefenorex, prenylamine, and even selegiline.
Personally? Me thinks any messing around with the...