Paracetamol for adults
About paracetamol for adults
Paracetamol is a common painkiller used to treat aches and pain. It can also be used to reduce a high temperature.
It's available combined with other painkillers and anti-sickness medicines. It's also an ingredient in a wide range of cold and flu remedies.
For under-16s, read our information on paracetamol for children.
- Paracetamol takes up to an hour to work.
- The usual dose of paracetamol is one or two 500mg tablets at a time.
- Do not take paracetamol with other medicines containing paracetamol.
- Paracetamol is safe to take in pregnancy and while breastfeeding, at recommended doses.
- Brand names include Disprol, Hedex, Medinol and Panadol.
Who can and cannot take paracetamol
Most people can take paracetamol safely, including pregnant and breastfeeding women.
However, some people need to take extra care with paracetamol.
Check with your doctor or pharmacist if you:
- have had an allergic reaction to paracetamol or any other medicines in the past
- have liver or kidney problems
- regularly drink more than the maximum recommended amount of alcohol (14 units a week)
- take medicine for epilepsy
- take medicine for tuberculosis (TB)
- take the blood-thinner warfarin and you may need to take paracetamol on a regular basis
How and when to take it
Paracetamol can be taken with or without food.
The usual dose for adults is one or two 500mg tablets up to 4 times in 24 hours.
Always leave at least 4 hours between doses.
Overdosing on paracetamol can cause serious side effects. Do not be tempted to increase the dose or to take a double dose if your pain is very bad.
Adults can take a maximum of 4 doses (up to eight 500mg tablets in total) in 24 hours. Wait at least 4 hours between doses.
Different types of paracetamol
Paracetamol is widely available as tablets and capsules.
For people who find it difficult to swallow tablets or capsules, paracetamol is also available as a syrup or as soluble tablets that dissolve in water to make a drink.
What if I take too much?
Taking 1 or 2 extra tablets by accident is unlikely to be harmful, as long as you do not take more than 8 tablets in 24 hours.
Wait at least 24 hours before taking any more paracetamol.
Call your local emergency service if you take:
- more than 2 extra tablets of paracetamol
- more than 8 tablets of paracetamol in 24 hours
Taking too much paracetamol can be dangerous and you may need treatment.
If you need to go to an emergency unit, take the paracetamol packet or leaflet inside it plus any remaining medicine with you.
What if I forget to take it?
If you take paracetamol regularly and miss a dose, take it as soon as you remember. However, skip the missed dose if it's nearly time for your next dose.
Never take double doses of paracetamol. Do not take an extra dose to make up for a missed one.
If you forget doses often, it may help to set an alarm to remind you. You could also ask your pharmacist for advice on other ways to help you remember to take your medicine.
Taking paracetamol with other painkillers
It's safe to take paracetamol with other types of painkiller that don't contain paracetamol, such as ibuprofen, aspirin and codeine.
Do not take paracetamol alongside other medicines that contain paracetamol. If you take 2 different medicines that contain paracetamol, there's a risk of overdose.
Before taking any other medicines, check the label to see whether they contain paracetamol.
Paracetamol is an ingredient in many remedies you can buy from pharmacies and supermarkets, including:
- migraine remedies
- cough and cold products, such as Lemsip and Night Nurse
Some prescription medicines contain paracetamol combined with other painkillers, such as:
- co-codamol (paracetamol and codeine)
- co-dydramol (paracetamol and dihydrocodeine)
- Tramacet (paracetamol and tramadol)
Paracetamol very rarely causes side effects if you take it at the right dosage.
If you're worried about a side effect or notice anything unusual, talk to your pharmacist or doctor.
Serious allergic reaction
In rare cases, it's possible to have a serious allergic reaction (anaphylaxis) to paracetamol.
Call your local emergency service if:
- you get a skin rash that may include itchy, red, swollen, blistered or peeling skin
- you're wheezing
- you get tightness in the chest or throat
- you have trouble breathing or talking
- your mouth, face, lips, tongue or throat start swelling
You could be having a serious allergic reaction and may need immediate treatment in hospital.
These are not all the side effects of paracetamol. For a full list, see the leaflet inside your medicines packet.
Pregnancy and breastfeeding
Paracetamol is the first choice of painkiller if you're pregnant or breastfeeding.
It's been taken by many pregnant and breastfeeding women with no harmful effects in the mother or baby.
For more information about how paracetamol can affect you and your baby during pregnancy, read this leaflet on the Best Use of Medicines in Pregnancy (BUMPS) website.
If you take paracetamol in pregnancy or while breastfeeding, take the lowest dose of paracetamol that works for you for the shortest possible time.
Cautions with other medicines
It's safe to take paracetamol with most prescription medicines, including antibiotics.
Paracetamol isn't suitable for some people. Talk to your doctor if you take:
- the blood-thinner warfarin – paracetamol can increase the risk of bleeding if you take it regularly
- medicine to treat epilepsy
- medicine to treat tuberculosis (TB)
Mixing paracetamol with herbal remedies and supplements
Check with your doctor or pharmacist if you're taking St John's wort (a herbal remedy taken for depression) as you may need to reduce your paracetamol dose.
Otherwise, paracetamol isn't generally affected by also taking herbal remedies or supplements.
For safety, tell your doctor or pharmacist if you're taking any other medicines, including herbal remedies, vitamins or supplements.