• fast, pounding, or uneven heartbeat;

• feeling light-headed or short of breath;

• nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or

• easy bruising or bleeding, unusual weakness, fever, chills, body aches, flu symptoms.

Less serious side effects may include:

• drowsiness;

• dizziness,, confusion or lightheadedness;

• dry mouth;

• nausea, vomiting, stomach pain, loss of appetite;

• feeling anxious or jittery;

• drunk feeling; or

• headache.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

What other drugs will affect acetaminophen, butalbital, and caffeine?

The following drugs can interact with acetaminophen, butalbital, and caffeine. Tell your doctor if you are using any of these:

• an antibiotic;

• a blood thinner such as warfarin (Coumadin);

• isoniazid;

• zidovudine (Retrovir, AZT);

• seizure medication such as phenytoin (Dilantin) or phenobarbital (Luminal, Solfoton);

• gout medications such as probenecid (Benemid) or sulfinpyrazone;

• an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine (Parnate);

• steroids such as prednisone, fluticasone (Advair), mometasone (Asmanex, Nasonex), dexamethasone (Decadron, Hexadrol) and others; or

• an antidepressant such as amitriptyline (Elavil, Etrafon), clomipramine (Anafranil), desipramine (Norpramin), imipramine (Janimine, Tofranil), and others.

This list is not complete and there may be other drugs that can interact with acetaminophen, butalbital, and caffeine. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about acetaminophen, butalbital, and caffeine.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.