It is a controlled substance used to treat certain kinds of headaches.

Those abbreviations stand for butalbital, acetaminophen and caffeine - this product is a common headache medication.

Endocet is a brand name for acetaminophen-oxycodone tablets or capsules. These are pain-killers.

One certain medication prescribed for migraines contains a barbiturate (butalbital)

There are three formulations:

Fioricet - butalbital, acetaminophen, caffeine

Fioricet with codeine - butalbital, acetaminophen, caffeine, codeine

Fiorinal - butalbital, aspirin, caffeine

No other medications prescribed for migraine contain barbiturates.

Barbiturates as a drug class have been phased out nearly completely by benzodiazepines (Xanax, Ativan, etc..), although some barbiturates are still used to treat epilepsy (and even then, there are many, many newer anti-epilepsy medications for a doctor to choose from).

The numbers correspond to the strength of the drugs within the medication.

Butalbital (50mg) - Acetaminophen (325mg) - Caffeine (40mg).