Acetaminophen is a pain reliever and fever reducer.Butalbital is in a group of drugs called barbiturates. It relaxes muscle contractions involved in a tension headache.Caffeine is a central nervous system stimulant. It relaxes muscle contractions in blood vessels to improve blood flow.The combination of acetaminophen, butalbital, and caffeine is used to treat tension headaches that are caused by muscle contractions.Acetaminophen, butalbital, and caffeine may also be used for other purposes not listed in this medication guide.

The combination of acetaminophen, butalbital, and caffeine comes as a capsule and tablet to take by mouth. It usually is taken every 4 hours as needed. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take acetaminophen, butalbital, and caffeine exactly as directed. Do not take more than six tablets or capsules in 1 day. If you think that you need more to relieve your symptoms, call your doctor.

This medication can be habit-forming. Do not take a larger dose, take it more often, or for a longer period than your doctor tells you to.

Before taking Zebutal

• tell your doctor and pharmacist if you are allergic to acetaminophen, butalbital, caffeine, or any other drugs.
• tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially anticoagulants ('blood thinners') such as warfarin (Coumadin), antidepressants, antihistamines, pain medications, sedatives, sleeping pills, tranquilizers, and vitamins. Many nonprescription pain relievers contain acetaminophen. Too much of this drug can be harmful.
• tell your doctor if you have or have ever had liver disease, porphyria, or depression.
• tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking this medication, call your doctor.
• you should know that this drug may make you drowsy. Do not drive a car or operate machinery until you know how this drug affects you.
• remember that alcohol can add to the drowsiness caused by this drug.