Paracetamol is one of the most commonly used medicines for relieving pain and reducing fever. It is also known as acetaminophen in some countries. Paracetamol 500 mg tablets are commonly used for conditions such as headache, toothache, muscle pain, body aches, sore throat, and fever associated with cold or flu.
Although paracetamol is generally safe when used correctly, taking more than the recommended amount can cause serious liver damage. It is therefore important to follow the instructions on the medicine package or the advice of a doctor or pharmacist.
What is Paracetamol 500 mg Tablet?
Paracetamol 500 mg tablet contains 500 mg of paracetamol as its active ingredient. It belongs to the group of medicines called analgesics (painkillers) and antipyretics (fever reducers).
It is mainly used to reduce mild to moderate pain and high body temperature. Unlike medicines such as ibuprofen, paracetamol is not primarily used as an anti-inflammatory medicine.
Paracetamol is available in several forms, including tablets, capsules, liquids and suppositories. The strength and formulation may differ between products, so always check the label before taking it.
What is Paracetamol Used For?
Paracetamol can be used for temporary relief of:
- Headache
- Fever
- Toothache
- Sore throat
- Muscle pain
- Body aches
- Joint pain
- Period pain
- Pain associated with cold and flu
- Mild to moderate general pain
It can also be included in some combination medicines used for cold, cough and flu symptoms. This is important because taking a separate paracetamol tablet together with another medicine containing paracetamol can result in an accidental overdose.
Paracetamol for headache and fever
Paracetamol is commonly used to reduce headaches and fever. However, the underlying cause of persistent fever or repeated headaches should be evaluated by a healthcare professional rather than repeatedly using painkillers without finding the cause.
How Does Paracetamol Work?
The exact mechanism of paracetamol is not completely understood. It mainly acts within the central nervous system to reduce the body's perception of pain and help lower fever.
It is different from many traditional NSAID painkillers because it has relatively little anti-inflammatory activity at normal doses.
Paracetamol 500 mg Dosage
The correct dose depends on the person's age, weight, medical condition, other medicines being taken and the strength of the product.
Adult dose
For commonly used 500 mg tablets, adults can generally take 1 or 2 tablets per dose, with at least 4 hours between doses.
Do not take more than 8 × 500 mg tablets (4,000 mg) in 24 hours unless a healthcare professional has specifically advised otherwise. Some people may need a lower maximum daily dose, particularly those with liver problems, low body weight, heavy alcohol use or other risk factors.
Always follow the instructions on your particular product because recommended doses can vary.
Children
Children should not automatically be given the adult 500 mg tablet. Children's paracetamol doses are usually determined according to age, weight and the formulation being used.
Use a product specifically intended for children and follow the package instructions or advice from a doctor or pharmacist.
Older adults
Older adults may require additional consideration depending on their health, weight, liver and kidney function and other medicines they take. A doctor or pharmacist can recommend the appropriate dose when necessary.
How to Take Paracetamol 500 mg
Swallow the tablet with water.
Paracetamol tablets can generally be taken with or without food.
Do not take another dose sooner than recommended. If you are unsure about the correct dose, ask a pharmacist or doctor.
Most importantly, check the ingredients of other medicines you are taking. Some cold, flu and pain medicines also contain paracetamol.
Side Effects of Paracetamol
Paracetamol usually causes few side effects when it is taken at the recommended dose. However, side effects can still occur.
Possible side effects include:
- Skin rash
- Itching
- Nausea
- Allergic reactions
- Rare blood-related problems
- Liver problems, particularly after taking too much
A serious allergic reaction may cause swelling of the face, lips, tongue or throat and difficulty breathing. Severe liver problems can cause symptoms such as yellowing of the skin or eyes, dark urine and upper abdominal pain. Seek urgent medical attention if these symptoms occur.
Can Paracetamol Damage the Liver?
Yes. Taking too much paracetamol can cause serious liver damage.
This is one of the most important safety points about paracetamol. An overdose can be dangerous even when symptoms are not present initially.
People with liver disease or those who regularly drink large amounts of alcohol should speak with a healthcare professional before using paracetamol.
Never intentionally exceed the recommended dose.
Paracetamol and Kidney Health
When taken at the recommended dose, paracetamol is generally considered safer for the kidneys than many NSAID painkillers. However, people with kidney disease should discuss regular or prolonged use with a healthcare professional.
Do not assume that a medicine is completely risk-free simply because it is available without a prescription.
Paracetamol During Pregnancy
Paracetamol is commonly used during pregnancy when needed, but pregnant women should still discuss medicines with their doctor, midwife or pharmacist and use the lowest effective dose for the shortest appropriate period.
Do not self-medicate repeatedly during pregnancy for unexplained pain or fever. Persistent fever or severe pain should be medically assessed.
Can Breastfeeding Women Take Paracetamol?
Paracetamol is generally considered suitable during breastfeeding. Only small amounts of many medicines pass into breast milk, and paracetamol is listed by the NHS among painkillers that can be used while breastfeeding.
If the product contains additional active ingredients, check with a doctor or pharmacist because the safety of the combination may be different.
Paracetamol and Alcohol
Regularly drinking large amounts of alcohol can increase concerns about paracetamol-related liver injury.
If you drink heavily or have a history of liver disease, ask a healthcare professional about whether paracetamol is appropriate for you.
Important Drug Interactions
Paracetamol can interact with some medicines. The risk depends on the medicine, dose and duration of treatment.
Tell your doctor or pharmacist about all prescription medicines, over-the-counter medicines, vitamins and supplements you use.
Some medicines that may require special consideration include:
- Warfarin
- Carbamazepine
- Phenytoin
- Rifampicin
- Some medicines used for epilepsy
- Some medicines used for tuberculosis
- Other products containing paracetamol
The most common practical problem is accidental duplication—for example, taking a paracetamol tablet together with a cold or flu medicine that also contains paracetamol.
Who Should Be Careful With Paracetamol?
Speak with a doctor or pharmacist before using paracetamol if you:
- Have liver disease
- Have kidney disease
- Regularly drink large amounts of alcohol
- Have previously experienced an allergic reaction to paracetamol
- Take several prescription medicines
- Are taking another medicine containing paracetamol
- Need to use paracetamol regularly for a long period
The NHS also advises caution in people with liver or kidney conditions and those who are dependent on alcohol or drink heavily.
What Happens If You Take Too Much Paracetamol?
Taking too much paracetamol can cause paracetamol poisoning and serious liver damage.
Possible symptoms include:
- Nausea
- Vomiting
- Loss of appetite
- Abdominal or upper abdominal pain
- Sweating
- Extreme tiredness
- Yellowing of the skin or eyes
Importantly, symptoms may not appear immediately after an overdose. Therefore, anyone who has taken more paracetamol than recommended should seek medical help even if they feel well.
Treatment of Paracetamol Overdose
Paracetamol overdose requires medical assessment. N-acetylcysteine (NAC) is the main antidote used in the treatment of significant paracetamol poisoning.
The treatment and timing are determined by healthcare professionals based on factors such as the amount taken, time since ingestion and blood test results.
Do not try to treat an overdose yourself.
Can Paracetamol Cause Sleepiness?
Paracetamol by itself is not normally a sedative medicine and does not usually make people sleepy.
However, some combination medicines that contain paracetamol may contain other ingredients that can cause drowsiness. Always check the label of combination products before driving or operating machinery.
Can You Drive After Taking Paracetamol?
Paracetamol itself does not normally impair alertness or driving ability when used correctly.
However, if you feel dizzy, unwell or sleepy, you should not drive. Also be careful with combination cold and flu medicines because some ingredients can cause drowsiness.
Can Paracetamol Be Used for Migraine?
Paracetamol can provide pain relief for some people with migraine, particularly when taken early in an attack.
However, recurrent or severe migraine should be assessed by a healthcare professional because other migraine-specific treatments may be more appropriate.
Can Paracetamol Be Used for Back Pain?
Paracetamol may provide some pain relief for certain types of pain, but it is not suitable for every cause of back pain.
If back pain is severe, persistent, associated with weakness or numbness, or accompanied by other concerning symptoms, seek medical advice rather than relying only on painkillers.
Can Paracetamol Be Taken With Multivitamins?
There is generally no reason that a standard multivitamin would prevent the use of paracetamol. However, it is always sensible to tell your pharmacist or doctor about all medicines and supplements you are taking.
Frequently Asked Questions
Is Paracetamol 500 mg safe?
Paracetamol is generally safe when taken according to the recommended dose. Taking too much can cause serious liver damage, so the dose should never be exceeded.
Can I take two Paracetamol 500 mg tablets at once?
Adults can commonly take one or two 500 mg tablets per dose, provided the product instructions allow it and there are at least 4 hours between doses. Do not exceed the recommended daily maximum.
Can children take Paracetamol 500 mg tablets?
Children should not automatically receive the adult 500 mg tablet. Children's doses depend on age, weight and the specific formulation. Use a children's product and follow professional or package instructions.
Is Paracetamol addictive?
Paracetamol is not considered an addictive medicine. However, taking it unnecessarily or exceeding the recommended dose can still cause serious health problems.
Can I take Paracetamol on an empty stomach?
Yes. Paracetamol tablets can generally be taken with or without food.
What should I do if I accidentally take too much Paracetamol?
Seek medical advice immediately, even if you feel completely normal. An overdose can cause serious liver damage and symptoms may be delayed.
Is expired Paracetamol safe to use?
Do not rely on expired medicine. Check the expiry date before taking any medicine and replace expired products. If you have already taken an expired tablet and are concerned, contact a pharmacist or doctor.
Does Paracetamol cause sleep?
Paracetamol itself does not normally cause sleepiness. Some combination medicines containing paracetamol may cause drowsiness because of their other ingredients.
Final Advice
Paracetamol 500 mg is a useful medicine for temporary relief of pain and fever when used correctly. The most important safety rule is not to exceed the recommended dose and not to take more than one paracetamol-containing product at the same time.
If you have liver or kidney disease, drink alcohol heavily, take several medicines, are pregnant, or need painkillers for a prolonged period, ask a healthcare professional for individual advice.
For more pharmaceutical and medicine-related information, you can also read:
- Cetirizine: Best Medicine for Seasonal Allergy
- Carboxymethylcellulose Eye Drops: Uses, Dosage, Side Effects and Precautions
- Look-Alike and Sound-Alike (LASA) Medications: Causes, Consequences and Prevention
References
- NHS. Paracetamol for adults – uses, dosage, side effects and safety information.
- MedlinePlus. Acetaminophen – uses, precautions, side effects and overdose information.
- MedlinePlus. Acetaminophen overdose – symptoms and safety information.
- NHS. Breastfeeding and medicines.
- MedlinePlus. Pregnancy and Medicines.
Article reviewed for general educational accuracy: August 2026
Disclaimer: This article provides general educational information about paracetamol. It does not replace advice from a doctor, pharmacist or other qualified healthcare professional. Do not use this information to diagnose or treat a medical condition or to determine an individual dose.
