Safely Buy Ponstan ( Mefenamic Acid ) from Canada Prescriptions Plus.

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Prescription Required
Formulation : Capsule
Drug Name Dosage Quantity Price Buy Now
Ponstan 250mg 100 $61.10 Add To Cart
Dosage: 250mg
Quantity: 100
Price: $61.10

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Mefenamic Acid

Prescription Required
Formulation : Capsule
Drug Name Dosage Quantity Price Buy Now
Mefenamic Acid 250mg 100 $40.10 Add To Cart
Mefenamic Acid
Dosage: 250mg
Quantity: 100
Price: $40.10


Ponstan is a pain medication used to relieve symptoms of inflammation, pain, and fever due to various conditions including arthritis, operations, childbirth, and menstruation.

Mefenamic Acid is a non-steroidal anti-inflammatory drug (NSAID) that binds to nucleotides to inhibit inflammatory receptors throughout your system. Ponstan combines this anti-inflammatory action with antipyretic and analgesic properties to help relieve pain and discomfort from a variety of conditions.

This pain medication has been proven to be an effective treatment for mild to moderate pain and painful menstruation. Ponstan functions similar to other NSAIDs and displays comparable incidences of adverse reactions while offering unique pain-relieving properties.

Uses and Dosage

The dose prescribed of Ponstan will vary depending on the individual and condition being treated. Follow all your doctor’s instructions and read packaging labels carefully to ensure the best therapeutic results.

  • Swallow capsules whole, do not crush or chew
  • Take with food
  • Most adults take an initial dose of 500mg followed by 250mg as needed every six hours
  • Adults should not take more
  • For menstrual pain, adults should take an initial 500mg at the onset of bleeding and symptoms
  • Maintenance doses for menstrual pain are usually 250mg every 6 hours as needed
  • Adults should not take Ponstan for more than 2 or 3 days to treat menstrual pain
  • Store at room temperature away from children and pets

Side Effects

Ponstan may cause some side effects to develop while relieving your pain. Speak with your doctor for more information regarding any symptoms that you may encounter when taking mefenamic acid.

Common Ponstan side effects:

  • Dizziness, drowsiness
  • Sweating
  • Rapid heartbeat
  • Loss of appetite
  • Constipation, bloating
  • Blurred vision, eye irritation
  • Ringing or buzzing in your ears
  • Swelling of hands and feet
  • Troubles sleeping
  • Ear pain

Serious Side Effects

Some more serious adverse reactions may occur when taking mefenamic acid. Stop using Ponstan and call your doctor if you develop any of the following side effects:

  • Diarrhea
  • Bloody or tarry stools
  • Vomiting blood or vomit that looks like coffee grounds
  • Indigestion, heartburn, stomach pain
  • Low red blood cell count (tiredness, shortness of breath, paleness)
  • Low white blood cell count (fever, sore throat, mouth ulcers, repeated infections or ones that won’t improve)
  • Seizures
  • Low sodium levels (headache, nausea, vomiting, tiredness, muscle cramps)
  • Sudden headache, stiff neck, fever, light sensitivity, drowsiness, muscle pain
  • Kidney problems (fever, rash, nausea, aches, passing more or less urine, blood in your urine, urinating more at night)
  • High blood pressure
  • Pain behind your ribs moving towards your back
  • Liver problems (jaundice, dark urine, nausea, stomach problems, loss of appetite, tiredness)

Allergic Reactions

Do not use Ponstan if you are allergic to mefenamic acid, any other NSAID, or any of the other listed capsule ingredients. If you notice any signs of an allergic reaction, stop using this medication and contact your doctor.

Ponstan allergy symptoms may include:

  • Hives, itching
  • Difficulty breathing or swallowing
  • Swelling of the face, lips, tongue, or throat
  • Blisters around your mouth, eyes, or genitals
  • Rash and peeling skin


Avoid drinking alcohol or smoking during your Ponstan treatment. These can irritate your stomach and cause some mefenamic acid side effects to worsen.

Mefenamic acid can affect your fertility and may make it more difficult for you to become pregnant. Consult with your doctor if you are planning to become pregnant or if you have any troubles getting pregnant.

Avoid driving or performing any hazardous tasks that require alertness until you know how Ponstan will affect you.

Mefenamic acid can cause you to become drowsy and dizzy.

Do not take Ponstan if you have any of the following:

  • Peptic ulcer, stomach bleeding, severe gastritis
  • Inflammatory bowel disease
  • Severe heart, liver, or kidney problems
  • If you have just had heart bypass surgery
  • If you are more than 6 months pregnant

To ensure your safety when taking Ponstan, tell your doctor if you have any of the following:

  • Kidney or liver problems
  • Stomach or digestive tract problems
  • A bleeding disorder
  • If you are going to have a major operation
  • Asthma or a history of asthma
  • A connective tissue disorder
  • Epilepsy
  • Heart problems, high blood pressure, or if you have had a stroke
  • if you are trying to become pregnant

Tell your doctor if you are pregnant or plan to become pregnant while taking Ponstan. It is unclear how mefenamic acid will affect an unborn child when taking during the first 6 months of pregnancy, but it can delay or prolong labour and cause other complications if taken in the last 3 months.

Do not breastfeed while using Ponstan because it can pass into your breastmilk and cause harm to your nursing child.

Some other medications may interact with mefenamic acid and cause adverse effects. To avoid this, tell your doctor about all the medications that you take, including any over the counter medicines, but especially any of the following:

  • Corticosteroids to treat arthritis and inflammation
  • Blood thinners
  • Other NSAIDs (ibuprofen, diclofenac, and others)
  • Other anti-inflammatory medicines including steroids
  • Aspirin
  • Blood thinners
  • SSRI antidepressants
  • Blood pressure medications
  • Diuretics or heart medicines
  • Certain diabetes medications such as glipizide or glibenclamide
  • Immunosuppressive medicines
  • Lithium
  • Antibiotics

Form and Strength

This pain relief medication is available in capsule form.

Ponstan capsule strength:

  • 250mg

The 250mg Ponstan capsules are available in quantities of 100.


Can you take Ponstan on an empty stomach?

You should take your Ponstan doses with food or after having eaten. When taken on an empty stomach, you may experience more gastrointestinal symptoms such as an upset stomach. To avoid other gastrointestinal issues you should also ensure that you swallow the Ponstan capsule whole.

What should you avoid while taking Ponstan?

During treatment with Ponstan you should avoid drinking alcohol and smoking tobacco. Both can cause an increase in unwanted side effects, especially gastrointestinal ones, and cause damage. You should also avoid driving or performing any hazardous tasks until you know how mefenamic acid will affect you because it can cause dizziness and drowsiness.



Additional information

Brand Name:


Scientific Name:

Mefenamic Acid

Other Names:

Mefenamic Acid, Ponstan



Quantities Available: