Paracetamol 500mg

What Is Paracetamol 500mg and How Does It Help?

Paracetamol 500mg is one of the most widely used over-the-counter medicines in the UK. It relieves mild to moderate pain and reduces fever, making it a go-to option for everyday ailments — from tension headaches and toothache to the aches that come with a cold or flu. You can browse our full range of pain relief products if you need something more targeted for your symptoms.

Paracetamol has been used clinically for decades and has a well-established safety profile when taken correctly. It is suitable for most adults and children over 16 at the standard 500mg tablet strength, and it is available without a prescription from pharmacies across the UK.

How Does Paracetamol Work to Relieve Pain and Fever?

Paracetamol acts centrally in the brain and spinal cord. Unlike ibuprofen or aspirin, it does not work primarily by reducing inflammation at the site of injury. Instead, it targets the pain and temperature regulation pathways in the central nervous system. Here is how it works:

• It inhibits the synthesis of prostaglandins — chemical messengers that sensitise nerve endings to pain and signal the hypothalamus to raise body temperature.
• By reducing prostaglandin activity in the brain, it lowers the perception of pain signals travelling from the body.
• It acts on the hypothalamus to bring down an elevated temperature, helping you feel more comfortable during a fever.
• Because it does not significantly inhibit peripheral prostaglandins, it is much gentler on the stomach than non-steroidal anti-inflammatory drugs (NSAIDs).

Who Is Paracetamol 500mg Suitable For?

Paracetamol 500mg tablets are suitable for a wide range of people. They are often the first-line recommendation from GPs and pharmacists for pain and fever because of their tolerability across different patient groups. That said, certain individuals should seek advice before use — more on that below.

• Adults and young people aged 16 and over
• People who cannot tolerate NSAIDs such as ibuprofen due to stomach problems
• Pregnant women (at the lowest effective dose, for the shortest time, on GP advice)
• People managing headaches, dental pain, period pain, back pain, or fever associated with cold and flu

How Does Paracetamol Compare to Ibuprofen for Pain Relief?

How Should You Store Paracetamol 500mg Tablets?

Store paracetamol tablets below 25°C in a dry place, away from direct sunlight and moisture. Keep them in their original packaging so you can always check the expiry date and dosage instructions. Most importantly, keep all medicines out of the reach and sight of children — paracetamol overdose is a medical emergency. If you are managing multiple health conditions, you might also find our cold and flu range useful, as many combination cold remedies already contain paracetamol — always check labels to avoid accidental double-dosing.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

What Is Paracetamol 500mg and What Is It Used For?

Paracetamol 500mg tablets are an analgesic (painkiller) and antipyretic (fever reducer) available over the counter in the UK. They are used to treat mild to moderate pain including headaches, migraines, toothache, back pain, period pain, and muscular aches. They are also used to reduce a high temperature (fever) associated with infections such as colds and flu.

Paracetamol is classified as a General Sale List (GSL) medicine in the UK, meaning it can be purchased without a prescription from pharmacies, supermarkets, and online retailers. It is one of the most commonly recommended medicines by NHS clinicians for everyday pain management.

What Do You Need to Know Before Using Paracetamol 500mg?

Before taking paracetamol, it is important to check whether it is appropriate for you. Do not take these tablets if any of the following apply:

• You are allergic to paracetamol or any of the tablet's excipients
• You have severe liver disease or active liver failure
• You are already taking another medicine that contains paracetamol (check all cold, flu, and combination pain relief products carefully)
• You have phenylketonuria (some formulations may contain aspartame)

Speak to your pharmacist or GP before taking paracetamol if you have liver or kidney problems, regularly drink alcohol, are underweight or malnourished, or are taking any of the following medicines:

• Warfarin or other anticoagulants — regular paracetamol use may enhance anticoagulant effect
• Carbamazepine, phenytoin, or other enzyme-inducing medicines — may reduce paracetamol's effectiveness and increase the risk of liver toxicity
• Metoclopramide or domperidone — may speed up paracetamol absorption
• Cholestyramine — may reduce paracetamol absorption if taken at the same time

How Should You Use Paracetamol 500mg?

Always read the patient information leaflet supplied with your tablets. Take paracetamol exactly as directed and never exceed the stated dose. Here is a step-by-step guide:

1. Check the packaging to confirm the tablets are within their expiry date.
2. Take 1 or 2 tablets (500mg or 1g) with a full glass of water.
3. Paracetamol can be taken with or without food.
4. Leave at least 4 hours between doses.
5. Do not take more than 4 doses (8 tablets of 500mg) in any 24-hour period.
6. If symptoms persist beyond 3 days, consult your GP or pharmacist.

If you are managing pain alongside other symptoms such as digestive discomfort, you may also want to explore our IBS and cramps range for additional support.

What Are the Possible Side Effects of Paracetamol 500mg?

Paracetamol is well tolerated by most people when taken at the recommended dose. Serious side effects are uncommon but can occur, particularly if the dose is exceeded.

Common side effects (may affect up to 1 in 10 people):

• Nausea (feeling sick) — usually mild
• General feeling of being unwell

Less common or rare side effects:

• Skin rash or itching — stop taking and seek medical advice if this occurs
• Low blood pressure (hypotension) — reported rarely with intravenous paracetamol; less relevant at oral doses
• Blood disorders such as thrombocytopenia (low platelet count) — very rare
• Liver damage — this is the most serious risk and occurs almost exclusively with overdose or prolonged excessive use

If you experience any unexpected symptoms after taking paracetamol, stop use and speak to a pharmacist or GP. For a suspected overdose, call 999 or go to A&E immediately — do not wait for symptoms to develop, as liver damage may not be apparent for 24–72 hours.

How Should You Store Paracetamol 500mg?

• Store below 25°C in a dry place, away from direct heat and sunlight
• Keep in the original packaging to protect from moisture
• Do not store in a bathroom cabinet — humidity can degrade the tablets
• Keep out of the reach and sight of children at all times
• Do not use after the expiry date printed on the packaging
• Do not dispose of medicines via wastewater or household waste — return unused tablets to your pharmacy

If you are looking to support your overall health alongside pain management, our vitamins and supplements range includes products that may help with general wellbeing.