Active Ingredient
Paracetamol (Acetaminophen) 665mg per tablet — sustained-release bi-layer formulation
What Panadol Extend Tablets Are Used For
Panadol Extend is a sustained-release paracetamol tablet specifically formulated for adults requiring long-lasting relief from persistent and recurring pain. Unlike standard paracetamol tablets, the unique bi-layer design delivers pain relief for up to 8 hours, reducing the frequency of dosing required throughout the day. This medication is indicated for:
- Osteoarthritis and chronic joint pain
- Backache and lower back pain
- Joint and muscular aches
- Headaches and tension headaches
- Toothache and dental pain
- Persistent pain requiring around-the-clock management
The bi-layer tablet works through two simultaneous mechanisms. The immediate-release layer delivers a fast onset of pain relief within 30-60 minutes, while the sustained-release layer gradually releases the remaining paracetamol over the following hours, maintaining consistent therapeutic levels in the bloodstream and extending relief for up to 8 hours. This delivery system is particularly beneficial for patients with chronic conditions such as osteoarthritis, where pain is persistent throughout the day and overnight and requires continuous rather than intermittent management.
Important Safety Information
Who Should NOT Take Panadol Extend
Do not use this medication if you are allergic to paracetamol or any other ingredients in this product, have severe liver disease or liver failure, are currently taking other medications containing paracetamol or acetaminophen, have severe kidney disease, or regularly consume large amounts of alcohol.
Serious Warnings and Precautions
Liver Damage Risk: Paracetamol can cause serious liver damage, including acute liver failure requiring transplantation or resulting in death, if too much is taken or taken too frequently. The higher dose per tablet (665mg compared to standard 500mg) requires careful attention to dosing limits. Never exceed the recommended dose or frequency. Check all other medications you are taking to ensure they do not also contain paracetamol, as it is found in many over-the-counter cold, flu, sinus, and pain medications. With Panadol Extend, accidental overdose through combining products is a particularly serious risk due to the sustained-release mechanism, meaning paracetamol continues releasing into the bloodstream for hours after ingestion.
Drinking alcohol while taking paracetamol significantly increases your risk of liver damage. If you regularly consume 3 or more alcoholic drinks per day, consult your doctor before using this medication.
Do Not Crush or Chew: The sustained-release mechanism of Panadol Extend depends entirely on the intact bi-layer structure of the tablet. Crushing, chewing, splitting, or breaking the tablet destroys this mechanism and causes the full 665mg dose to be released immediately rather than gradually, significantly increasing the risk of paracetamol toxicity and liver damage. Always swallow tablets whole.
Kidney Function Warning: The sustained-release formulation means paracetamol remains active in the body for longer periods. Patients with reduced kidney function may have difficulty clearing the medication efficiently, increasing the risk of accumulation and toxicity. Consult your doctor before using this product if you have any degree of kidney impairment.
Chronic Pain Considerations: While Panadol Extend is designed for persistent pain, long-term daily use of paracetamol should only be undertaken under medical supervision. Persistent pain, particularly from conditions such as osteoarthritis, requires a comprehensive treatment approach including medical evaluation, physical therapy, and lifestyle modification alongside pain medication.
Contact emergency services or go to the nearest emergency room immediately if you have taken more than the recommended dose, experience signs of overdose including nausea, vomiting, loss of appetite, confusion, sweating, or abdominal pain, develop yellowing of skin or eyes or dark urine, if pain significantly worsens or changes in character, if new symptoms appear, or if you are concerned about your condition at any point.
Consult Your Doctor Before Use If You Have:
Liver disease or impaired liver function of any degree, kidney disease or reduced kidney function, Gilbert's syndrome, are severely underweight or malnourished, regularly take warfarin or other blood-thinning medications (paracetamol at sustained doses can enhance the blood-thinning effect of warfarin), have G6PD deficiency, are pregnant or breastfeeding, take medications that affect the liver including certain antibiotics and anti-seizure medications, drink alcohol regularly, have chronic pain that has not been formally diagnosed, or are taking any other prescription or over-the-counter medications.
Common Side Effects
Panadol Extend is generally well-tolerated and gentle on the stomach compared to anti-inflammatory pain relievers such as ibuprofen or aspirin. However, some people may experience nausea or mild digestive discomfort, allergic reactions including rash, itching, or hives, and rarely, blood disorders. Serious allergic reactions are rare but require immediate medical attention. Stop use and seek emergency care if you develop difficulty breathing, severe skin reactions including blistering or peeling, or facial and throat swelling.
Drug Interactions
Paracetamol can interact with several medications. Inform your doctor or pharmacist if you are taking warfarin or other anticoagulants, as regular use of paracetamol can enhance their blood-thinning effect and increase bleeding risk, medications that affect the liver including certain antibiotics such as rifampicin, anti-seizure medications including phenytoin, carbamazepine, and phenobarbital, metoclopramide or domperidone which affect paracetamol absorption rates, cholestyramine which reduces paracetamol absorption, isoniazid used for tuberculosis, or any other medications containing paracetamol or acetaminophen.
How to Take Panadol Extend
Adults should take 2 tablets (1330mg) up to three times daily. Do not take more than 6 tablets (3990mg) in 24 hours. Space doses at least 6-8 hours apart to align with the sustained-release duration. Swallow tablets whole with a full glass of water. Do not crush, chew, split, or break tablets under any circumstances. Can be taken with or without food, though the gentle stomach profile of this formulation means stomach upset is uncommon even when taken on an empty stomach.
Do not use this medication for more than 10 consecutive days for pain without consulting your doctor. If pain persists, worsens, or changes in character, seek medical evaluation rather than continuing to self-medicate.
Based on our pharmacists' experience, patients managing chronic conditions such as osteoarthritis achieve the most consistent pain control by taking Panadol Extend at regular scheduled intervals rather than waiting until pain becomes severe. Taking the medication on a consistent schedule maintains steady paracetamol levels in the bloodstream, preventing the peaks and troughs associated with standard immediate-release formulations. Patients should be reminded that the 8-hour duration means doses should never be taken more frequently than every 6 hours, even if pain feels inadequately controlled, and that additional paracetamol products must not be used alongside Panadol Extend under any circumstances.
What You Need to Know Before Starting Treatment
Panadol Extend treats pain as a symptom but does not address the underlying cause of chronic conditions such as osteoarthritis or recurring back pain. Persistent joint and muscular pain requires comprehensive medical management including diagnosis, physical therapy, weight management where relevant, and appropriate lifestyle modifications alongside pain relief medication.
Understanding the Sustained-Release Difference: Panadol Extend contains 665mg of paracetamol per tablet compared to 500mg in standard Panadol tablets. The dosing schedule and maximum daily dose are therefore different. Do not substitute Panadol Extend for standard Panadol tablets on a dose-for-dose basis, as this will result in a higher total paracetamol intake than intended. Never take both formulations simultaneously.
Warfarin and Blood Thinners: Patients taking warfarin should be aware that regular, sustained use of paracetamol can progressively enhance warfarin's anticoagulant effect, increasing bleeding risk. If you take warfarin and require regular pain relief, inform your doctor so that your INR can be monitored appropriately during treatment.
Osteoarthritis Management: Based on our pharmacists' observations, patients with osteoarthritis often achieve significantly better outcomes when paracetamol is used as part of a broader management strategy. Gentle low-impact exercise such as swimming or walking, weight management, hot and cold therapy, and regular physiotherapy can meaningfully reduce pain levels and improve quality of life, potentially reducing the dose of pain medication required.
When Medical Evaluation Is Necessary: Seek medical attention if joint or back pain is severe, sudden in onset, or accompanied by swelling, redness, warmth, or fever, if pain is accompanied by neurological symptoms such as numbness, tingling, or weakness, if pain interferes significantly with daily activities, sleep, or mobility, or if you have been self-medicating for more than 10 days without improvement.
Pregnancy and Breastfeeding: Paracetamol is generally considered safe during pregnancy when taken at recommended doses for short periods. However, prolonged or frequent use during pregnancy, as may be required for chronic pain management, should be discussed carefully with your healthcare provider. Always use the lowest effective dose for the shortest necessary duration, and consult your doctor before using sustained-release formulations during pregnancy or breastfeeding.
Storage Instructions
Store at room temperature below 25°C, protected from moisture and direct sunlight. Keep in original packaging until ready to use. Keep in a dry place away from bathrooms and kitchen sinks where humidity can compromise tablet integrity. Keep out of reach and sight of children, as paracetamol overdose is particularly dangerous with sustained-release tablets because the full dose continues releasing even after ingestion, making treatment more complex. Do not use after the expiration date printed on the package. Do not transfer tablets to other containers. Dispose of expired or unused medication responsibly.
Accidental Overdose Information
Paracetamol overdose from sustained-release tablets is a particularly serious medical emergency that requires immediate treatment even more urgently than standard formulations. Because the tablet continues releasing paracetamol into the bloodstream for hours after ingestion, the total amount of paracetamol absorbed following overdose is significantly higher and the timeline of toxicity is extended and less predictable than with immediate-release formulations. Standard overdose assessment tools may underestimate the severity of toxicity from sustained-release products.
Even if you feel completely well after taking too much, serious and potentially fatal liver damage can develop over 24-72 hours. Do not wait for symptoms to appear before seeking help.
If overdose is suspected, call your local poison control center or emergency services immediately. Have the medication packaging available to provide specific information about the sustained-release formulation. Note the time of overdose and the total number of tablets taken, as well as any other medications taken in the past 24 hours. Do not attempt to make yourself vomit unless specifically instructed by medical professionals. Go to the nearest emergency room immediately regardless of how you feel.
Treatment with N-acetylcysteine is most effective when started within 8-10 hours of overdose. However, due to the extended release profile, monitoring and treatment may need to continue for longer periods than with standard paracetamol overdoses. Medical staff should be specifically informed that the overdose involved a sustained-release formulation.
Symptoms of paracetamol overdose may include nausea, vomiting, loss of appetite, sweating, confusion, abdominal pain particularly in the upper right side, jaundice, dark urine, pale stools, unusual bleeding or bruising, and extreme tiredness. These symptoms often do not appear until 12-24 hours or more after ingestion.
Manufacturer Information
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Regulatory Status: This medication is available over-the-counter for adults aged 18 years and above. Due to the higher paracetamol content per tablet and sustained-release mechanism, this formulation is not recommended for children or adolescents under 18 years without specific medical guidance.
Medical Review Notice: This product information should be reviewed by a licensed pharmacist or physician to ensure clinical accuracy and compliance with current prescribing guidelines. Patients with chronic pain conditions, those taking multiple medications, older adults, and those with any degree of liver or kidney impairment should consult their healthcare provider before using this product.
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