Generic Name: acetaminophen (oral)
- What is acetaminophen?
- What are the possible side effects of acetaminophen?
- What is the most important information I should know about acetaminophen?
- What should I discuss with my healthcare provider before taking acetaminophen?
- How should I take acetaminophen?
- What happens if I miss a dose?
- What happens if I overdose?
- What should I avoid while taking acetaminophen?
- What other drugs will affect acetaminophen?
- Where can I get more information?
What is acetaminophen?
Acetaminophen is a pain reliever and a fever reducer. There are many brands and forms of acetaminophen available. Not all brands are listed on this leaflet.
Acetaminophen is used to treat many conditions such as headache, muscle aches, arthritis, backache, toothaches, colds, and fevers.
Acetaminophen may also be used for purposes not listed in this medication guide.
What are the possible side effects of acetaminophen?
Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
In rare cases, acetaminophen may cause a severe skin reaction that can be fatal. This could occur even if you have taken acetaminophen in the past and had no reaction. Stop taking this medicine and call your doctor right away if you have skin redness or a rash that spreads and causes blistering and peeling. If you have this type of reaction, you should never again take any medicine that contains acetaminophen.
Stop taking acetaminophen and call your doctor at once if you have signs of liver problems: loss of appetite, stomach pain (upper right side), tiredness, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).
Less serious side effects may be more likely, and you may have none at all.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is the most important information I should know about acetaminophen?
You should not use acetaminophen if you have severe liver disease.
Use this medicine exactly as directed on the label, or as prescribed by your doctor. An overdose of acetaminophen can damage your liver or cause death.
Avoid also using other medicines that contain acetaminophen (sometimes abbreviated as APAP), or you could have a fatal overdose.
Call your doctor at once if you have nausea, pain in your upper stomach, itching, loss of appetite, dark urine, clay-colored stools, or jaundice (yellowing of your skin or eyes).
Stop taking this medicine and call your doctor right away if you have skin redness or a rash that spreads and causes blistering and peeling.
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What should I discuss with my healthcare provider before taking acetaminophen?
You should not take acetaminophen if you are allergic to it, or if you have severe liver disease.
Ask a doctor before using this medicine if you are pregnant or breastfeeding.
Do not give this medicine to a child younger than 12 years old without the advice of a doctor. Extra-strength acetaminophen is not for use in a child younger than 6 years old.
How should I take acetaminophen?
Use exactly as directed on the label, or as prescribed by your doctor.
Do not take more than your recommended dose. An overdose of acetaminophen can damage your liver or cause death.
- Adults and teenagers who weigh at least 110 pounds (50 kilograms): Do not take more than 1000 milligrams (mg) at one time. Do not take more than 4000 mg in 24 hours.
- Children younger than 12 years old: Do not take more than 5 doses of acetaminophen in 24 hours. Use only the number of milligrams per dose that is recommended for the child's weight and age. Use exactly as directed on the label.
- Avoid also using other medicines that contain acetaminophen, or you could have a fatal overdose.
If you are treating a child, use a pediatric form of acetaminophen. Use only the special dose-measuring dropper or oral syringe that comes with the specific pediatric form you are using. Carefully follow the dosing directions on the medicine label.
Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).
Acetaminophen made for infants is available in two different dose concentrations, and each concentration comes with its own medicine dropper or oral syringe. Using the wrong device may cause you to give your child an overdose of acetaminophen. Never mix and match dosing devices between infant formulations of acetaminophen.
You may need to shake the liquid before each use. Follow the directions on the medicine label.
The chewable tablet must be chewed thoroughly before you swallow it.
Make sure your hands are dry when handling a disintegrating tablet. Place the tablet on your tongue and allow it to dissolve, without chewing. Do not swallow the tablet whole. Allow it to dissolve in your mouth without chewing.
To use the effervescent granules, dissolve one packet of the granules in at least 4 ounces of water. Stir and drink this mixture right away. Add a little more water to the glass, swirl gently and drink right away.
Stop taking acetaminophen and call your doctor if:
- you still have a fever after 3 days of use;
- you still have pain after 7 days of use (or 5 days if treating a child);
- you have a skin rash, ongoing headache, or any redness or swelling; or
- if your symptoms get worse, or if you have any new symptoms.
This medicine can affect the results of certain lab tests for glucose (sugar) in the urine. Tell any doctor who treats you that you are using acetaminophen.
Store at room temperature away from heat and moisture.
What happens if I miss a dose?
Since acetaminophen is used when needed, you may not be on a dosing schedule. Skip any missed dose if it's almost time for your next dose. Do not use two doses at one time.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of acetaminophen can damage your liver or cause death.
What should I avoid while taking acetaminophen?
Ask a doctor or pharmacist before using any other medicine that may contain acetaminophen (sometimes abbreviated as APAP). Taking too much acetaminophen can lead to a fatal overdose.
Avoid drinking alcohol. It may increase your risk of liver damage.
What other drugs will affect acetaminophen?
Other drugs may affect acetaminophen, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.
Where can I get more information?
Your pharmacist can provide more information about acetaminophen.
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