Ponstan (Mefenamic Acid) 500mg Tablet

Brand Pfizer
Manufacturer Viatris
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Dr. Mohd Izzat Amir Bin Awang
Reviewed byDr. Mohd Izzat Amir Bin AwangDoctor of Medicine (MD), University of Mansoura - Manchester
Dr. Adeline Carol Peters
Written byDr. Adeline Carol PetersBachelor of Medicine and Bachelor of Surgery (MBBS) — Manipal Academy of Higher Education (MAHE)

Last updated:

Overview

Ponstan 500mg Tablet is a tablet with Mefenamic Acid 500mg declared as its active content. It is supplied in a pack size of 10s.

This is a non-prescription product and can be purchased without a prescription. Only product, safety and handling details are published on this page.

An online consultation with a DoctorOnCall doctor or pharmacist is available for this product, and a registered pharmacist reviews each order before dispatch to Malaysia or Singapore. Follow the directions on the label and on the leaflet inside the pack.

Directions for Use

Take Ponstan 500mg Tablet exactly as prescribed by your doctor, swallowing it whole with a glass of water and preferably with or after a meal to lessen the chance of stomach upset. Do not take it together with other NSAIDs, including aspirin used for pain relief, unless your doctor has specifically advised this, and do not continue treatment beyond the period your doctor has recommended.

Dosage

Your doctor will determine the appropriate dose and duration based on the type and severity of your pain; a common regimen for adults is an initial 500mg dose followed by 250mg every six hours as needed, typically for a short course rather than ongoing use. Do not take more than the maximum daily amount your doctor specifies. If you forget a dose and it is nearly time for the next one, skip the missed dose instead of taking two doses close together.

Storage Instructions

Store below 30°C in a dry place away from direct sunlight and moisture, keeping the tablets in their original packaging and out of the reach and sight of children.

Side Effects

  • Stomach pain or discomfort
  • Nausea or vomiting
  • Diarrhea or constipation
  • Headache
  • Dizziness
  • Skin rash
  • Heartburn or indigestion

Contraindications

  • Active peptic ulcer disease or a history of gastrointestinal bleeding
  • Severe kidney impairment
  • Severe liver impairment
  • Severe or decompensated heart failure
  • Known hypersensitivity to mefenamic acid, aspirin, or other NSAIDs (including NSAID-triggered asthma or urticaria)
  • Pregnancy, particularly in the third trimester
  • Active inflammatory bowel disease

Drug / Food Interactions

  • Anticoagulants such as warfarin, which increase bleeding risk when taken together
  • Other NSAIDs or aspirin, adding to gastrointestinal and kidney-related risk
  • ACE inhibitors, ARBs, and diuretics used together with an NSAID, which can reduce kidney function
  • Lithium, as mefenamic acid can raise blood lithium levels
  • Methotrexate, as NSAIDs can increase its toxicity
  • Corticosteroids, which increase the risk of stomach irritation in combination with an NSAID
  • Alcohol, which can worsen stomach irritation

Quick Tips

  • Take with food to help lower the risk of stomach irritation
  • Keep to the exact dose and course length your doctor prescribes
  • Check with your pharmacist before combining Ponstan with any other pain reliever
  • Seek urgent medical attention for black stools, severe abdominal pain, or vomiting blood
  • Drink enough fluids while taking this medicine
  • Let your doctor know about any history of ulcers, kidney disease, or heart conditions before starting treatment

Ingredients / Active Ingredients

  • Mefenamic Acid 500mg
  • Tablet binders and disintegrants
  • Film coating agents

Safety Advice

Pregnancy

Safe If Prescribed

This medicine should only be used during pregnancy if prescribed by a doctor after careful evaluation.

Breastfeeding

Use With Care

Use with caution. Monitor infant for potential adverse reactions.

Kidney

Safe If Prescribed

Use only if prescribed, with possible monitoring of kidney function.

Liver

Use With Care

Use cautiously. Liver function monitoring may be required.

Alcohol

Use With Care

Caution is advised when consuming alcohol with this medicine.

Driving

Use With Care

Use caution while driving until you know how this medicine affects you.

Relevant Information

Ponstan 500mg Tablet and Pontalon 500mg Tablet contain the same active ingredient and strength, mefenamic acid 500mg, but are different brands; your pharmacist or doctor can advise on brand availability, and either may be dispensed depending on stock and your doctor’s prescription. As with any mefenamic acid product, this medicine is generally intended for short-term relief of acute pain rather than long-term daily use, so consult your doctor again if your pain persists or returns frequently.

Frequently Asked Questions

Product Specifications

BrandPfizer
ManufacturerViatris
ClassificationNon-prescription
Ingredients / Active IngredientsMefenamic Acid
Pack Size10s
Shelf LifePonstan 500mg Tablet remains stable until the expiry date printed on the packaging when stored correctly. Do not use the tablets after this date.

Customer Reviews

4.7 · 20 reviews
  • Verified purchase

    Danish Irfan · Purchased: 10s

    Barang sampai cepat, thank you!

  • Verified purchase

    Amir Danish · Purchased: 10s

    Packaging secure and everything arrived safely.

  • Verified purchase

    Wong Pei Shan · Purchased: 10s

    Received in good condition. Thank you!

  • Verified purchase

    Lee Wen Qi · Purchased: 10s

    Good packaging and easy checkout.

  • Verified purchase

    Amira Sofea · Purchased: 10s

    Harga berpatutan, puas hati dengan service.

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Important Medical Information

💊 Recommended Dosage:

Your doctor will determine the appropriate dose and duration based on the type and severity of your pain; a common regimen for adults is an initial 500mg dose followed by 250mg every six hours as needed, typically for a short course rather than ongoing use. Do not take more than the maximum daily amount your doctor specifies. If you forget a dose and it is nearly time for the next one, skip the missed dose instead of taking two doses close together.

🛑 Contraindications (Do not use if):
  • Active peptic ulcer disease or a history of gastrointestinal bleeding
  • Severe kidney impairment
  • Severe liver impairment
  • Severe or decompensated heart failure
  • Known hypersensitivity to mefenamic acid, aspirin, or other NSAIDs (including NSAID-triggered asthma or urticaria)
  • Pregnancy, particularly in the third trimester
  • Active inflammatory bowel disease
If you are unsure, please chat with us or consult your doctor.
⚠️ Common Side Effects:
  • Stomach pain or discomfort
  • Nausea or vomiting
  • Diarrhea or constipation
  • Headache
  • Dizziness
  • Skin rash
  • Heartburn or indigestion
Stop taking this medication immediately and consult your doctor if you experience severe allergic reactions or side effects.
IMPORTANT: Unsure? Chat with our pharmacists (Mon - Sat, 9:00am - 6:00pm) before buying.