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DRUG DATABASE - ACETAMINOPHEN
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Generic Name:
acetaminophen (a-seet-a-MIN-oh-fen)
Brand Names:
Examples include Tylenol®
Classification:
Analgesic
Issue Date:
1961
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Acetaminophen is an analgesic and antipyretic (lowers fever). It works by lowering a
chemical in the brain that stimulates pain nerves and the heat-regulating center in the
brain.
Acetaminophen is used for treating minor aches and pains due to headache, muscle
aches, backache, arthritis, the common cold, flu, toothache, menstrual cramps,
and immunizations, and for temporarily reducing fever.
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Before Using This Medicine
Some medical conditions may interact with this medicine. Tell your doctor or
pharmacist if you have any medical conditions, especially if any of the following apply
to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal
preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have a history of alcohol abuse or you drink more than 3 alcohol-containing
drinks every day
- if you have liver or kidney problems, hepatitis, or phenylketonuria
- taking anticoagulants (eg, warfarin) because the risk of their side effects,
including bleeding, may be increased by Acetaminophen
- taking isoniazid because the risk of liver problems may be increased
This may not be a complete list of all interactions that may occur. Ask your health
care provider if Acetaminophen may interact with other medicines that you take. Check
with your health care provider before you start, stop, or change the dose of any medicine.
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Precautions
Acetaminophen may harm your liver. Your risk may be greater if you drink alcohol
while you are using Acetaminophen. Talk to your doctor before you take Acetaminophen or
other fever reducers if you drink more than 3 drinks with alcohol per day.
Severe or persistent sore throat or sore throat accompanied by high fever,
headache, nausea, and vomiting may be serious. Consult a doctor promptly.
Do not use for more than 2 days or give to children younger than 3 years old
unless directed by a doctor.
Acetaminophen may cause the results of some in-home test kits for blood cholesterol
to be wrong. Check with your doctor or pharmacist if you are taking Acetaminophen
and need to check your blood cholesterol at home.
For pain and fever in ADULTS:
Stop use of Acetaminophen and ask your doctor if pain gets worse or lasts more than
10 days, fever gets worse or lasts more than 3 days, or new symptoms occur or redness
or swelling is present.
For pain and fever in CHILDREN:
Stop use and ask a doctor if fever gets worse or lasts more than
3 days, pain gets worse or lasts more than 5 days, or redness or swelling is present
or any new symptoms appear.
PREGNANCY and BREAST-FEEDING:
If you become pregnant, contact your doctor. You will need to
discuss the benefits and risks of using Acetaminophen while you are pregnant. Acetaminophen
is found in breast milk. If you are or will be breast-feeding while you use
Acetaminophen, check with your doctor.
Contact your doctor or health care provider right away if any of these apply to you.
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How to use Acetaminophen
Use Acetaminophen as directed by your doctor. Check the label on the medicine for
exact dosing instructions.
- Take Acetaminophen by mouth with or without food.
- Replace original bottle cap to maintain child resistance.
- If you miss a dose of Acetaminophen and you are taking it regularly,
take it as soon as possible.
- If several hours have passed or if it is nearing time for the next dose,
do not double the dose to catch up, unless advised by your health care
provider. Do not take 2 doses at once.
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Safety Information About Acetaminophen
Acetaminophen has acetaminophen in it. Before you start any new medicine, check the label
to see if it has acetaminophen in it too. If it does or if you are not sure, check with
your doctor or pharmacist.
Acetaminophen may harm your liver. Your risk may be greater if you drink alcohol while
you are using Acetaminophen. Talk to your doctor before you take Acetaminophen or
other fever reducers if you drink more than 3 drinks with alcohol per day.
Severe or persistent sore throat or sore throat accompanied by high fever,
headache, nausea, and vomiting may be serious. Consult a doctor promptly. Do not
use for more than 2 days or give to children younger than 3 years old unless directed
by a doctor.
Acetaminophen may cause the results of some in-home test kits for blood cholesterol
to be wrong. Check with your doctor or pharmacist if you are taking Acetaminophen
and need to check your blood cholesterol at home.
For pain and fever in ADULTS:
Stop use of Acetaminophen and ask your doctor if pain gets worse or lasts more than
10 days, fever gets worse or lasts more than 3 days, or new symptoms occur or redness
or swelling is present.
For pain and fever in CHILDREN:
Stop use and ask a doctor if fever gets worse or lasts more
than 3 days, pain gets worse or lasts more than 5 days, or redness or swelling is
present or any new symptoms appear.
PREGNANCY and BREAST-FEEDING:
If you become pregnant, contact your doctor. You will need to
discuss the benefits and risks of using Acetaminophen while you are pregnant.
Acetaminophen is found in breast milk. If you are or will be breast-feeding while
you use Acetaminophen, check with your doctor. Discuss any possible risks to your baby.
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Side Effects
Get emergency medical help if you have any of these signs of an allergic reaction:
- Hives
- Difficulty breathing
- Swelling of your face, lips, tongue, or throat
Seek medical attention right away if any of these SEVERE side effects occur:
- dark urine or pale stools
- unusual fatigue
- yellowing of the skin or eyes
This is not a complete list of all side effects that may occur. If you have questions
or need medical advice about side effects, contact your doctor or health care provider.
You may report side effects to the FDA at 1-800-FDA-1088 (1-800-332-1088) or at
http://www.fda.gov/medwatch.
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Drug Interactions
Some medicines may interact with Acetaminophen. Tell your health care provider if
you are taking any other medicines, especially any of the following:
- Anticoagulants (eg, warfarin) because the risk of their side effects, including
bleeding, may be increased by Acetaminophen
- Isoniazid because the risk of liver problems may be increased
There may be other drugs not listed that can affect Acetaminophen. Tell your doctor
about all the prescription and over-the-counter medications you use. This includes
vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start
using a new medication without telling your doctor.
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