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Tylenol

Dr Karen Martin
Reviewed by Dr Karen MartinReviewed on 19.10.2023 | 3 minutes read
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Tylenol is the US brand for acetaminophen and is a common over the counter painkiller. It is used in adults, children, and infants to treat pain and fever in a wide range of conditions, including headache, toothache, earache, muscle pain, sprains and strains, period pain, arthritis, sore throat, post-immunization fever, colds, and flu.

Acetaminophen can be dangerous if you take too much, so make sure you only take one acetaminophen-containing product at a time. It can appear in all sorts of products such as cold and flu remedies - so worth a careful look!

In what formulations is it available?

The ingredient in Tylenol, acetaminophen, is available in tablets, capsules, gelcaps, chewable tablets, oral liquids, and suppositories (tablets for the rectum).

How much should I take?

Acetaminophen can be taken up to 4 times a day. The dosage depends on your age and the formulation; this is listed below.

Adults and anyone aged 12+ years: 325 mg-1000 mg every 4-6 hours as needed for immediate-release products or 650 mg-1300 mg every 8 hours as needed for extended-release products (max 3000 mg/day) - or 4,000 mg/day under the supervision of a health care provider

Children under 12 years: 10-15 mg/kg every 4-6 hours as needed (max 2,400 mg/day). Babies aged 2 years and younger should only receive acetaminophen after consultation with a primary care provider.

Are there any side effects?

Side effects are generally uncommon for acetaminophen. As with all medications, there is the potential for serious side effects, such as an allergic reaction. You should stop taking acetaminophen and seek urgent medical attention if you develop a skin rash, shortness of breath, wheezing, tightness in your chest or throat or swelling of your tongue, mouth, lips, face or throat. This is not a complete list of side effects; you can find a complete list in the patient information leaflet provided with acetaminophen. If you are concerned about any side effects, you should speak to your doctor or pharmacist.

Who should not take Tylenol?

Acetaminophen is not suitable for everyone. You should not take it if you have previously had an allergic reaction to acetaminophen or another ingredient listed in the medication. Acetaminophen should not be given to babies under 2 months old.

You should speak to your local doctor before taking acetaminophen if you have liver or kidney problems or drink more than 14 units of alcohol each week on a regular basis, as it may not be suitable for you.

Diabetics and people with phenylketonuria need to be careful when taking liquid, effervescent tablet and chewable tablet forms of acetaminophen as they may contain sugar or aspartame, so it may be best for them to avoid these formulations.

Acetaminophen can interact with other medicines such as warfarin, lomitapide, cholestyramine and lenalidomide. If you take any prescription, over-the-counter or herbal medicines we recommend you ask your doctor or pharmacist to check they are safe to take alongside acetaminophen.

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This article has been written by UK-based doctors and pharmacists, so some advice may not apply to US users and some suggested treatments may not be available. For more information, please see our T&Cs.
Dr Karen Martin
Reviewed by Dr Karen Martin
Reviewed on 19.10.2023
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