There are 118 anesthetic substances and 119 psychotropic substances under government control, and the unauthorized possession or use of any of them is a criminal offense
A few of US commonly "prescribed medications", illegal to possess in China.
Buprenorphine detox for heroin addicts
Diazepam Valium
Dihydroetophine thebaine
Pethidine Demerol
Triazolam Halcion