Fioricet, a barbiturate painkiller for migraine headaches, is a potentially addictive drug that is not strictly regulated by the U.S. Drug Enforcement Administration. Even so, the DEA does regulate another drug that contains the same amount of the barbiturate found in Fioricet. Fioricet, produced by Sandoz Pharmaceuticals, contains the barbiturate butalbital, mixed with acetaminophen, the active ingredient in Tylenol.