What drug contains barbiturate's?

Answer

muscle relaxants: flrxeril etc.

Barbitutes are most often found in drugs like Firorecet and Seconal. Not muscle relaxers. Barbiturates are very addictive and very few muscle relaxers have that time of drug in them..
yes it is a barbituate
Phentermine is in the amphetamine and phenethylamine class of drugs.