Tylenol Side Effects

Tylenol (acetaminophen) is a pain reliever and a fever reducer.

Tylenol is used to treat many conditions such as headache, muscle aches, arthritis, backache, toothaches, colds, and fevers.

You should not use Tylenol if you are allergic to Tylenol.

Ask a doctor or pharmacist if it is safe for you to take Tylenol if you have:

  • liver disease; or
  • a history of alcoholism.

Do not take this medication without a doctor’s advice if you have ever had alcoholic liver disease (cirrhosis) or if you drink more than 3 alcoholic beverages per day. You may not be able to take Tylenol.

It is not known whether Tylenol will harm an unborn baby. Before using this medicine, tell your doctor if you are pregnant. Acetaminophen can pass into breast milk and may harm a nursing baby. Do not use Tylenol without telling your doctor if you are breast-feeding a baby.

Do not give acetaminophen to a child younger than 2 years old without the advice of a doctor.

Get emergency medical help if you have any of these signs of an allergic reaction to Tylenol: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using this medication and call your doctor at once if you have a serious side effect such as:

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

This is not a complete list of Tylenol side effects and others may occur. Call your doctor for medical advice about side effects.