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Acetaminophen/Paracetamol

Acetaminophen/Paracetamol

Acetaminophen (Paracetamol) is used to relieve pain and reduce fever. It’s a common pain reliever prescribed for mild to moderate discomfort caused by headaches, backache, toothache, menstrual cramps, muscle pain, arthritis, colds, and flu. Paracetamol belongs to a class of medicines known as analgesics (pain relievers) and antipyretics (fever reducers). Your doctor may also recommend it for other conditions as appropriate.

Category: Analgesic
Medically Reviewed by – Millie Chapman, NP
Last Updated on 8 July 2026

What is Acetaminophen/Paracetamol used for?

Acetaminophen, known as Paracetamol in the UK, is commonly used to relieve mild to moderate pain and reduce fever. It’s effective for headaches, toothaches, menstrual cramps, muscle aches, and colds. It’s often chosen because it’s gentle on the stomach compared to other painkillers, but it should be taken exactly as directed to avoid liver damage. Acetaminophen/Paracetamol may also be used to treat other conditions as determined by your doctor.

What are the side effects of Acetaminophen/Paracetamol?

Common side effects of Acetaminophen (Paracetamol) are generally mild, but serious reactions can occur with misuse or overdose. Possible side effects include:

  • Nausea or vomiting

  • Loss of appetite

  • Stomach pain (especially if taken on an empty stomach)

  • Skin rash or itching

  • Dark urine or pale stools

  • Yellowing of the skin or eyes (signs of liver problems)

  • Fatigue or unusual weakness

Always follow dosage instructions carefully and seek medical help if severe symptoms appear.

What is the recommended dosage of Acetaminophen/Paracetamol?

The recommended dosage of Acetaminophen (Paracetamol) depends on age and health condition. Always follow the label or your doctor’s advice. Typical adult dosage includes:

  • Adults: 500 mg to 1,000 mg every 4–6 hours as needed

  • Maximum dose: Do not exceed 4,000 mg in 24 hours

  • Children: Use age-appropriate liquid or chewable forms, based on weight

  • Avoid combining with other medicines containing Paracetamol

Overuse may cause serious liver damage, so never exceed the recommended limit.

What if you miss a dose of Acetaminophen/Paracetamol?

If you miss a dose of Acetaminophen (Paracetamol), follow these simple steps:

  • Take it as soon as you remember, unless it’s nearly time for your next dose.

  • Do not double up to make up for the missed one.

  • Continue your regular schedule for future doses.

  • If you often forget, set a reminder to take your medication on time.

  • Seek advice from your pharmacist or doctor if you’re unsure.

Taking extra doses can increase the risk of liver damage.

What if you overdose on Acetaminophen/Paracetamol?

If you overdose on Acetaminophen (Paracetamol), seek medical help immediately. Signs of overdose may include:

  • Nausea or vomiting

  • Severe stomach pain

  • Loss of appetite

  • Yellowing of skin or eyes (jaundice)

  • Confusion or weakness

Do not wait for symptoms to appear. Go to the nearest hospital or contact emergency services right away.

What other drugs could interact with Acetaminophen/Paracetamol?

  • Carbamazepine
  • Cholestyramine
  • Isoniazid
  • Phenobarbital
  • Warfarin
It’s important to note that medicines other than those mentioned may also interact with Acetaminophen (Paracetamol). Acetaminophen (Paracetamol) can interact with certain medicines, such as blood thinners. Drug interactions usually occur when it’s taken alongside another medication or with certain foods. Before taking any medicine, always inform your healthcare professional about any other medications, including over-the-counter products, vitamins, minerals, or herbal supplements, as these may increase Acetaminophen’s effects. Let your doctor know if you smoke, drink alcohol or caffeine, or use any recreational drugs, as these may affect how the medicine works. Also, disclose any existing medical conditions or family history of health problems. Never start or stop a medicine without consulting your doctor first.

Where can I buy Acetaminophen over the counter in UK?

You can buy Acetaminophen (Paracetamol) over the counter in the UK from local pharmacies, supermarkets, or convenience stores. It’s commonly sold in tablet, capsule, or liquid form. You can also order it online from registered UK pharmacies. Always buy from trusted sources and follow the package instructions for safe and effective use.

Can I buy Acetaminophen Tylenol Online Price without a prescription in UK?

Yes, you can buy Acetaminophen (Tylenol) online in the UK without a prescription, as it’s an over-the-counter medicine. Make sure you purchase only from licensed UK pharmacies or trusted online retailers. Prices may vary depending on the brand and strength. Always check that the seller is registered and follow dosage instructions carefully for safe use.

How much paracetamol in Calpol at UK?

In the UK, Calpol contains Paracetamol as its main ingredient. The amount depends on the product type: Calpol Infant Suspension usually has 120mg of Paracetamol per 5ml, while Calpol Six Plus Suspension contains 250mg per 5ml. Always check the label for exact strength and follow the dosing instructions suitable for your child’s age and weight.

What are the questions to ask your doctor before taking Acetaminophen/Paracetamol?

Is it possible for me to take Acetaminophen/Paracetamol with other drugs? Should certain beverages, foods and other products be avoided when I take Acetaminophen/Paracetamol? What are the possible drug interactions of Acetaminophen/Paracetamol? How will Acetaminophen/Paracetamol work in my body? How should Acetaminophen/Paracetamol be taken? How to reduce the risk of Acetaminophen/Paracetamol drug interactions and side effects?

Note

Before taking Acetaminophen (Paracetamol), inform your doctor if you have a history of alcohol use or liver disease. While using Acetaminophen (Paracetamol) tablets, avoid drinking alcohol, as it may increase the risk of liver damage. Let your doctor know if you are pregnant, planning to become pregnant, or breastfeeding. The medical information provided here is intended to support, not replace, the advice and judgement of your doctor, pharmacist, or other healthcare professional. It should not be taken as confirmation that Acetaminophen (Paracetamol) is safe or suitable for you. Always consult your healthcare provider before using this or any other medicine.

FAQ

Can you take Paracetamol and Ibuprofen together?

Yes, you can take Paracetamol and Ibuprofen together in the UK. They work differently to relieve pain and reduce fever. You can take them at the same time or alternate doses for longer relief. Always follow the correct dosage and speak with a pharmacist if unsure about timing or frequency

Can dogs have Paracetamol?

No, dogs should not be given Paracetamol unless prescribed by a vet. Even small amounts can be toxic and cause serious liver damage. Never give human medicines to pets without veterinary advice. If your dog has pain or fever, contact your vet immediately for safe and suitable alternatives.

Can you take Naproxen with Paracetamol?

Yes, Paracetamol and Naproxen can be taken together safely in most cases, as they work in different ways. Paracetamol helps reduce pain and fever, while Naproxen reduces inflammation. Always follow dosage instructions and avoid combining with other painkillers unless advised by your doctor or pharmacist.

How old do you need to be to buy Paracetamol?

In the UK, there’s no strict legal age limit to buy Paracetamol, but most shops and pharmacies sell it only to those aged 16 or over. This ensures safe use and prevents accidental overdose. For younger children, a parent or guardian should purchase and supervise its use.

What is the price Acetaminophen/Paracetamol in UK?

In the UK, Acetaminophen (Paracetamol) is widely available at pharmacies, supermarkets, and online health stores at an affordable cost. Prices vary based on the form, such as tablets, capsules, or liquid suspension. Generic options are usually inexpensive. Always choose licensed sellers and check packaging for proper strength and dosage instructions before purchasing.

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