Acetaminophen overdose is one of the most common poisonings worldwide. People often think that acetaminophen, a pain-relieving medicine, is extremely safe. However, it may be deadly if taken in large doses.

Acetaminophen is found in a variety of over-the-counter and prescription pain relievers.

Tylenol is a brand name for acetominophen. Other medicines that contain acetominophen include:

• Anacin-3
• Liquiprin
• Panadol
• Percocet
• Tempra
• Various cold and flu medicines

Note: This list is not all inclusive.

Common dosage forms and strengths:

• Suppository: 120 mg*, 125 mg, 325 mg, 650 mg
• Chewable tablets: 80 mg
• Junior tablets: 160 mg
• Regular strength: 325 mg
• Extra strength: 500 mg
• Liquid: 160 mg/teaspoon
• Drops: 100 mg/mL, 120 mg/2.5 mL

*mg = milligrams

You should not take more than 4000 mg of acetaminophen a day. Taking more, especially 7000 mg or more, can lead to a severe overdose if not treated.

• Abdominal pain
• Appetite loss
• Coma
• Convulsions
• Diarrhea
• Irritability
• Nausea
• Sweating
• Upset stomach
• Vomiting

Note: Symptoms may not occur until 12 or more hours after the acetaminophen was swallowed.