Fioricet may have some side effects, some are serious side effects, some are not serious side effects.

The serious fioricet side effects are:

      • an allergic reaction including difficulty breathing;
      • closing of your throat;
      • swelling of your lips, tongue, or face;
      • ¬†hives;
      • ¬†slow, weak breathing;
      • liver damage (yellowing of the skin or eyes, nausea, abdominal pain or discomfort, unusual bleeding or bruising, severe fatigue);
      • blood problems (easy or unusual bleeding or bruising);
      • or low blood sugar (fatigue, increased hunger or thirst, dizziness, or fainting)
      • If you experience above side effects, stop taking Fioricet immediately.

Before taking this medication, tell your doctor or pharmacist if you are allergic to acetaminophen, caffeine, or butalbital; or to other barbiturates (such as phenobarbital) or xanthine derivatives (such as theophylline); or if you have any other allergies.

This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: severe breathing problems (such as bronchopneumonia), a certain enzyme disorder (porphyria), liver disease, kidney disease, personal or family history of a substance use disorder (such as overuse of or addiction to drugs/alcohol), mental/mood disorders, abdominal/stomach problems (such as stomach ulcer). This drug may make you dizzy or drowsy.

Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis). Liquid products may contain alcohol, sugar and/or aspartame.

Caution is advised if you have diabetes, alcohol dependence, liver disease, phenylketonuria (PKU), or any other condition that requires you to limit/avoid these substances in your diet. Ask your doctor or pharmacist about using this product safely.

Before having surgery or certain medical procedures (such as a heart stress test or a procedure to restore a normal heart rhythm if you have an unusually fast heartbeat), tell your doctor or dentist that you use this medication and about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Older adults may be more sensitive to the side effects of this drug, especially drowsiness and trouble falling asleep.

These side effects can increase the risk of falling. During pregnancy, this medication should be used only when clearly needed. Using it for long periods or in high doses near the expected delivery date is not recommended because of possible harm to the unborn baby. Discuss the risks and benefits with your doctor.

Infants born to mothers who have used this medication for an extended time may have withdrawal symptoms such as irritability, abnormal/persistent crying, vomiting, seizures, or diarrhea.

Tell your doctor right away if you notice any of these symptoms in your newborn. This drug passes into breast milk and could have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.

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