Topic Overview
Acetaminophen (such
as Tylenol) reduces fever and relieves pain. It does not reduce
swelling, as do nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin
and ibuprofen, but it also is less likely to cause stomach upset and other side
effects.
Be sure to follow the
nonprescription medicine precautions.
Dosage
- Adults: The usual dose is
650 mg. Take every 4 hours,
as needed, up to 4 times in a 24-hour period. Do not take more than 3,000 mg in
a 24-hour period.
- Children: Check with your child's doctor if your child is less than 2 years old or less than 24 pounds. Give
acetaminophen every 4 hours as needed. Do not give more than 5 doses in a
24-hour period. Dosages are based on the child's weight. There are different acetaminophen products for infants and children.
- Follow all instructions on the label. If you give medicine to your baby, follow your doctor’s advice about what amount to give. Do not use acetaminophen if your child is allergic to it.
- Acetaminophen and ibuprofen are different products with different dosing recommendations. Talk to your child’s doctor before switching back and forth between doses of acetaminophen and ibuprofen. When you switch between two medicines, there is a chance your child will get too much medicine.
Studies have not shown any added benefit from alternating these medicines.
- Talk to your doctor before you give medicine to reduce a fever in a baby who is 3 months of age or younger. This is to make sure a young baby's fever is not a sign of a serious illness. The exception is if your baby has just had an immunization. Fevers sometimes occur as a reaction to immunizations. After immunizations, you can give your baby medicine to reduce a fever.
Caution: Do not use this dose table with any other concentration of this medicine. Use only with the concentration of 160 mg in 5 mL. Check the label on your medicine to find the concentration.
Acetaminophen dose (160 mg in 5 ml) for your child's weight| Child's weight in
pounds | Child's weight in
kilograms | Dose in milligrams | Dose in milliliters |
|---|
6.0–11.0 | 2.5–5.4 | Ask a doctor | Ask a doctor |
12.0–17.0 | 5.5–7.9 | 80 mg | 2.5 ml or 1//2 teaspoon |
18.0–23.0 | 8.0–10.9 | 120 mg | 3.75 ml or 3/4 teaspoon |
24.0–35.0 | 11.0–15.9 | 160 mg | 5 ml or 1 teaspoon |
36.0–47.0 | 16.0–21.9 | 240 mg | 7.5 ml or 1 1/2 teaspoon |
48.0–59.0 | 22.0–26.9 | 320 mg | 10 ml or 2 teaspoons |
60.0–71.0 | 27.0–31.9 | 400 mg | 12.5 ml or 2 1/2 teaspoons |
72.0–95.0 | 32.0–43.9 | 480 mg | 15 ml or 3 teaspoons |
Side effects of acetaminophen are rare if it is taken in correct doses.
- Nausea and rash are the most
common.
- High doses of acetaminophen can cause liver and kidney
damage.
Reasons not to take acetaminophen
Do not take acetaminophen if you:
- Have kidney disease.
- Have liver
disease.
- Drink alcohol heavily (3 or more drinks a day for men and
2 or more drinks a day for women).
Credits
| By | Healthwise Staff |
|---|
| Primary Medical Reviewer | William H. Blahd, Jr., MD, FACEP - Emergency Medicine |
|---|
| Specialist Medical Reviewer | David Messenger, MD |
|---|
| Last Revised | November 11, 2011 |
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