- Fast Delivery
- Muslim-Friendly
- FDA Approved
- Secure Payment
- 0% InterestNo interest on eligible instalments
- Flexible paymentsSpread your payment across monthly instalments
- No hidden feesClear and transparent pricing
Currently Out of Stock No Longer Available


Last updated:
Overview
Prime Mefetab 500mg Tablet contains Mefenamic acid 500mg and is presented as a tablet. It is supplied in a pack size of 10s.
It is classified as a non-prescription medicine, so no prescription is needed to order it. Under Malaysian rules for medicine information, this page carries product, safety and handling information only.
You can consult a doctor or pharmacist online on DoctorOnCall about this product before or after you order. Every order is checked by a registered pharmacist before it is delivered. Always read the label and the leaflet supplied with the pack.
Directions for Use
Take Prime Mefetab 500mg Tablet exactly as prescribed by your doctor, generally with or after food to reduce the risk of stomach upset, and swallow the tablet whole with a glass of water. Use the lowest effective dose for the shortest duration needed to control your pain, and do not exceed the prescribed frequency.
Dosage
The dose and duration of Prime Mefetab 500mg Tablet are determined by your doctor based on the type and severity of pain being treated, and treatment for period pain is often limited to the days when pain is present. Do not take this medicine for longer than 7 consecutive days without consulting your doctor.
Storage Instructions
Store Prime Mefetab 500mg Tablet below 30°C in a dry place, away from direct sunlight and moisture, and keep it out of the reach of children.
Side Effects
- Stomach pain or discomfort
- Nausea or vomiting
- Diarrhea or constipation
- Headache
- Dizziness
- Skin rash
- Heartburn or indigestion
Contraindications
- Active or history of peptic ulcer or inflammatory bowel disease
- Severe kidney or liver impairment
- Known hypersensitivity to mefenamic acid, aspirin, or other NSAIDs, including a history of asthma or allergic reaction triggered by these medicines
- Late pregnancy (third trimester)
- Severe heart failure
Drug / Food Interactions
- Increased bleeding risk when combined with anticoagulants such as warfarin, or antiplatelet agents like aspirin
- May reduce the effectiveness of certain blood pressure medicines, including ACE inhibitors and diuretics
- Increased risk of kidney impairment when combined with ACE inhibitors and diuretics together
- Should not be combined with other NSAIDs or corticosteroids due to increased gastrointestinal risk
- Lithium and methotrexate blood levels may increase when taken with mefenamic acid
Quick Tips
- Take Prime Mefetab 500mg Tablet with food to reduce the chance of stomach upset
- Do not use for longer than 7 consecutive days without consulting your doctor
- Avoid alcohol, which can increase the risk of stomach irritation
- Report black or tarry stools, severe stomach pain, or unusual bruising to your doctor immediately
- Do not combine with other pain relievers containing NSAIDs unless advised by your doctor
Ingredients / Active Ingredients
- Mefenamic acid 500mg
- Maize starch
- Lactose monohydrate
- Magnesium stearate
- Talc
Related Health Conditions
Safety Advice
Pregnancy
This medicine should only be used during pregnancy if prescribed by a doctor after careful evaluation.
Breastfeeding
Use with caution. Monitor infant for potential adverse reactions.
Kidney
Use only if prescribed, with possible monitoring of kidney function.
Liver
Use cautiously. Liver function monitoring may be required.
Alcohol
Caution is advised when consuming alcohol with this medicine.
Driving
Use caution while driving until you know how this medicine affects you.
Relevant Information
Prime Mefetab 500mg Tablet is commonly used for short courses of pain relief rather than continuous long-term use, and DoctorOnCall’s doctors will consider your gastrointestinal and kidney risk factors, along with any other medicines you take, before prescribing this tablet.
Frequently Asked Questions
No. Prime Mefetab 500mg Tablet is a non-prescription product and can be ordered without a prescription. It is still dispensed by a registered pharmacist on DoctorOnCall.
Prime Mefetab 500mg Tablet is a tablet containing Mefenamic acid 500mg. The full ingredient list is shown in the Composition or Ingredients section on this page and on the product packaging.
It is supplied in a pack size of 10s. Choose the pack size you need from the options shown on this page before adding the item to your cart.
This page is limited to product, safety and handling information in line with Malaysian rules on medicine information. If you want advice on whether this product suits you, book an online consultation with a doctor or pharmacist on DoctorOnCall.
Use it exactly as stated on the pack label, without changing the amount or how often you use it. If anything on the label is unclear, check with a pharmacist before the first use, and read the Directions for Use section on this page.
Yes. DoctorOnCall offers online consultations with licensed doctors and registered pharmacists, so you can ask about this product, your existing medicines, or anything on the label before you place an order.
Store Prime Mefetab 500mg Tablet below 30°C in a dry place, away from direct sunlight and moisture, and keep it out of the reach of children. Keep it in its original pack and do not use it after the expiry date printed on the packaging.
Stop using the product and speak to a doctor or pharmacist about any reaction that concerns you. Seek medical care immediately for signs of a severe reaction such as difficulty breathing, swelling of the face, lips or throat, or a widespread rash. Reported reactions are listed in the Side Effects section on this page.
Within Malaysia, standard delivery takes 3 to 5 working days. Same-day delivery is available in the Klang Valley for orders placed before 12pm; orders placed after 12pm arrive by the end of the next day.
Orders to Singapore are sent as international deliveries and take 5 to 9 working days. A lump-sum shipping and handling fee applies to every overseas delivery and is shown at checkout.
Customers in Malaysia can pay by FPX online banking, credit or debit card (Visa and Mastercard), and supported e-wallets including Touch ‘n Go eWallet, GrabPay and ShopeePay.
FPX and local e-wallets are tied to Malaysian bank and wallet accounts, so if your delivery address is in Singapore, use the payment options displayed at checkout for that address rather than assuming the same list applies.
Yes. DoctorOnCall ships to Singapore as an international order dispatched from Malaysia, arriving in 5 to 9 working days with a lump-sum shipping and handling fee.
Singapore’s Health Sciences Authority (HSA) allows personal imports of up to three months’ supply of a medicine for your own use or an immediate family member’s, as long as it contains no controlled drugs, psychotropic substances or prohibited items. Keep the product in its original labelled packaging and keep a copy of your prescription or doctor’s letter with it. Quantities above three months’ supply, and medicines containing controlled substances, require prior HSA approval.
Products listed on DoctorOnCall are registered with Malaysia’s Ministry of Health for supply in Malaysia, and each pack carries its MAL registration number.
An order delivered to Singapore arrives as a personal import of a Malaysia-registered product; HSA product registration is not required for personal-use quantities, but it is also not the same as a product registered for sale in Singapore. If you need a locally registered Singapore product, buy it from a pharmacy in Singapore.
DoctorOnCall’s customer care team handles order, delivery and product queries through the contact channels on the site, including WhatsApp and the online help centre.
For deliveries to Singapore, allow more time before chasing an order than you would for a local Malaysian delivery, as the parcel passes through customs clearance and tracking updates can appear later in the journey.
Product Specifications
| Brand | Prime |
|---|---|
| Classification | Non-prescription |
| Ingredients / Active Ingredients | Mefenamic Acid |
| Pack Size | 10s |
| Shelf Life | Prime Mefetab 500mg Tablet remains stable until the expiry date printed on the packaging when stored correctly and left unopened. Do not use the tablets after this date has passed. |
Have questions before you buy?
- Which mg is right for me?
- How do I store it?
- What are the sideeffects?
- What if I miss a dose?
- Delivery timings?
Support hours: Mon-Fri, 9AM-6PM (MYT)




