Ponstel (Mefenamic Acid) — Patient Guide (UK)

Ponstel is a brand of mefenamic acid, a medicine from the group of non-steroidal anti-inflammatory drugs (NSAIDs). It is used to help relieve pain and inflammation, and it is also commonly used for painful periods (dysmenorrhoea).

This guide explains how Ponstel works, how it is typically used, and what to consider for safety—especially when taking other medicines, drinking alcohol, or managing stomach and kidney risks. It also includes practical tips for getting the best results.

Quick facts

• Active ingredient: Mefenamic acid
• Medicine type: NSAID (painkiller with anti-inflammatory action)
• Common uses: Pain relief and period pain (dysmenorrhoea)
• How it’s taken: Usually by mouth, with food to reduce stomach upset
• Key cautions: Stomach irritation/ulcers, kidney effects, interactions with other NSAIDs or blood-thinners

Basic product information

Ponstel contains mefenamic acid. In the UK, mefenamic acid products are used for appropriate pain conditions, including period pain in line with authorised indications and clinical guidance.

How Ponstel works (mechanism of action)

Pain and inflammation are strongly linked to substances called prostaglandins. Prostaglandins help produce pain signals and contribute to inflammation and fever.

Mefenamic acid works by inhibiting an enzyme called cyclo-oxygenase (COX), which reduces prostaglandin production. With fewer prostaglandins, you may experience:

• Less pain (reduced pain signalling)
• Reduced inflammation
• Lower menstrual cramps and uterine pain associated with high prostaglandin levels

Pharmacokinetics (how the body handles mefenamic acid)

“Pharmacokinetics” describes what happens after you swallow a dose—how it is absorbed, broken down, and removed from the body. The exact timing can vary between individuals.

• Absorption: After oral dosing, mefenamic acid is absorbed from the gut into the bloodstream.
• Distribution: It distributes into body tissues and may bind to proteins in the blood.
• Metabolism: It is metabolised mainly in the liver.
• Elimination: Metabolites are removed from the body via the kidneys and the bile/intestines.

Because NSAIDs can affect the kidneys, people with dehydration, kidney disease, or those taking certain medicines (such as diuretics or some blood pressure tablets) should be cautious and follow medical advice.

Typical uses and indications in the UK

Ponstel is used to relieve pain and is particularly used for period pain. The exact wording of indications can differ by product licence, but commonly includes:

• Dysmenorrhoea (painful menstruation): Helps reduce cramping and pain around the time of periods.
• Pain of mild to moderate intensity: For short-term relief of certain acute painful conditions when appropriate.

If your pain is severe, persistent, or associated with other concerning symptoms (for example, heavy bleeding, fever, or unusual pelvic pain), you should seek medical advice rather than relying on an NSAID alone.

How to take Ponstel: dosing and timing

Always follow the instructions on the specific product pack and any clinician advice you receive. Dosing may vary depending on the condition being treated, your age, and your risk factors.

General principles

• Use the lowest effective dose for the shortest possible time.
• Take with food or milk to reduce the chance of stomach upset.
• Do not combine with other NSAIDs (such as ibuprofen, naproxen, diclofenac, aspirin for pain) unless a clinician specifically advises it.

Timing

Many people take mefenamic acid shortly after the start of symptoms. For period pain, it is often started at the beginning of cramps or bleeding. For other short-term pains, it is usually taken when pain becomes noticeable.

• Take doses regularly if symptoms persist, rather than “waiting too long” between doses.
• If you miss a dose: Take it when you remember unless it is near the time for your next dose. Do not take a double dose.

Typical adult dosing (general guidance)

Dosing schedules are often condition-specific. Many mefenamic acid regimens for adults are designed around frequent dosing in the early course, then continued briefly if needed. Your pack instructions will provide the exact schedule.

Important: Do not exceed the maximum daily dose stated on your product label, and do not use it longer than the authorised/labelled duration for your indication.

Food interactions (and how food affects your dose)

Ponstel can irritate the stomach lining in some people. Taking it with food may help reduce gastrointestinal side effects.

• With food: Often better tolerated; may reduce nausea, indigestion, and stomach pain.
• Empty stomach: More likely to cause stomach upset, heartburn, or nausea.

For best comfort, consider taking Ponstel after meals or with a snack if you are prone to stomach irritation.

Alcohol interactions and safety

Alcohol can increase the risk of stomach irritation and bleeding when used with NSAIDs. It may also worsen dizziness or drowsiness in some people.

• Best approach: Avoid alcohol or keep it to small amounts while taking Ponstel.
• Be extra cautious if: you have a history of stomach ulcers, gastrointestinal bleeding, gastritis, or take blood-thinning medicines.

Medicine interactions (other medicines you should tell us about)

Interactions can increase the risk of side effects or change how medicines work. Please check the ingredients and your medicine list carefully—especially if you take medicines for the heart, blood pressure, blood clotting, or mental health.

Common interaction categories

• Other NSAIDs: Increased risk of stomach bleeding and kidney strain. Avoid combining unless advised.
• Aspirin (for pain): Increased risk of gastrointestinal side effects. Low-dose aspirin prescribed for heart protection may be different; follow prescriber advice.
• Blood thinners (anticoagulants): Examples include warfarin and other oral anticoagulants. NSAIDs can increase bleeding risk.
• Antiplatelets: Examples include clopidogrel. Increased bleeding risk.
• Corticosteroids (e.g., prednisolone): Higher risk of stomach ulcers/bleeding.
• SSRIs/SNRIs (antidepressants): Such as sertraline, citalopram, venlafaxine, may raise GI bleeding risk.
• Diuretics (water tablets): NSAIDs can reduce kidney function and may affect blood pressure.
• ACE inhibitors/ARBs (blood pressure/heart medicines): Combined use with NSAIDs may increase kidney risk, especially in dehydration.
• Lithium: NSAIDs may increase lithium levels.
• Methotrexate: NSAIDs can affect methotrexate levels and toxicity.
• Diabetes medicines: Rarely, NSAIDs may affect blood sugar control.

Practical advice

• When ordering or requesting Ponstel, provide a full list of medicines and supplements you take.
• If you’re unsure about a medicine name or dose, check with a pharmacist.
• Stop and seek medical advice if you develop signs of bleeding (for example, black/tarry stools or vomiting blood).

Safety profile and side effects

Like all NSAIDs, mefenamic acid can cause side effects. Most people tolerate it when used correctly, but risk varies depending on age, dose, duration, and personal medical history.

Common side effects

• Stomach discomfort, indigestion, heartburn
• Nausea or vomiting
• Headache or dizziness
• Abdominal pain

Serious side effects: get urgent medical help

Seek urgent help if you notice any of the following:

• Signs of stomach or bowel bleeding: black/tarry stools, blood in vomit, severe stomach pain
• Allergic reaction: swelling of the face/lips, wheezing, rash, difficulty breathing
• Severe skin reactions: widespread rash or blistering
• Kidney problems: reduced urine, swelling of ankles/feet, severe tiredness
• Chest pain or sudden shortness of breath (rare, but important)

Who should be extra cautious

• People with a history of stomach ulcers or GI bleeding
• Older adults, due to higher risk of side effects
• People with kidney disease or dehydration
• People with certain heart conditions or a history of stroke (NSAID cardiovascular risks may be relevant)
• Asthma triggered by NSAIDs

Practical tips for safe use

• Take with food: This simple step reduces stomach irritation for many people.
• Hydrate: Drink adequate fluids, especially if you are unwell or in hot weather.
• Avoid “stacking” painkillers: Don’t take multiple NSAIDs together.
• Check the label: Make sure you understand the strength and number of capsules/tablets per dose.
• Know red flags: Stop and seek medical advice for bleeding symptoms or severe abdominal pain.
• Monitor duration: If pain persists beyond the expected course, get advice rather than continuing indefinitely.

Alternative options for pain and period pain

The best alternative depends on your condition, medical history, and the medicines you already take. In the UK, common options include:

• Paracetamol (acetaminophen): Helps with pain and is gentler on the stomach than NSAIDs for many people.
• Other NSAIDs: Such as ibuprofen or naproxen, which may be appropriate for some individuals (but still carry NSAID risks).
• For period pain: Options may include NSAIDs other than mefenamic acid, heat treatment, and, for some, hormonal approaches (where appropriate and under clinical guidance).
• Non-medicinal measures: Heat pads, rest, and gentle activity can help menstrual cramps for some people.

If you have frequent period pain, it may be helpful to discuss with a clinician to rule out underlying causes and to explore long-term strategies.

UK market, legal and guidance context (important notes)

In the United Kingdom, NSAID medicines—including mefenamic acid—are regulated and supplied in line with UK medicines legislation and clinical guidance. Advice on safe use often focuses on:

• Using NSAIDs at the lowest effective dose for the shortest duration.
• Assessing individual risk factors (stomach, kidney, cardiovascular risk and interactions).
• Avoiding unnecessary combination therapy with other NSAIDs.

Guidance for UK patients commonly recommends considering paracetamol for some types of pain and selecting NSAIDs when inflammation-related pain is suspected, provided the person can use them safely.

Always check the product-specific leaflet and current UK healthcare advice, particularly if you have a history of ulcers, kidney problems, or take anticoagulants.

Recent guidance and safety considerations

UK safety updates and clinical practice consistently emphasise:

• Minimising NSAID exposure when possible (shortest duration and lowest dose).
• Extra caution in higher-risk groups (older adults, those with GI or kidney disease, and those on interacting medicines).
• Recognising symptoms of bleeding and kidney impairment early.

If you’re pregnant, trying to conceive, or breastfeeding, NSAID use may require special caution and should be discussed with healthcare professionals. If you are in one of these situations, seek advice before using Ponstel.

Delivery and availability (UK)

Ponstel (mefenamic acid) availability may vary by supplier and pack size. When ordering through an online pharmacy, your delivery timeframe depends on:

• Stock levels at the fulfilment site
• Your postcode and delivery service chosen
• Whether the product is standard stock or needs additional processing

You can typically expect secure, tracked delivery options. If a particular strength or pack size is temporarily out of stock, the pharmacy may offer an alternative that is clinically appropriate or provide an estimated restock date.

Always store medicines as directed on the packaging (commonly at room temperature, away from moisture and direct sunlight) and keep out of reach of children.

FAQ — Ponstel (Mefenamic Acid)

1) What is Ponstel used for?

Ponstel is used for pain relief and is often used for painful periods (dysmenorrhoea). It may be used for short-term management of mild to moderate pain when appropriate.

2) When should I start taking it for period pain?

Many people start at the beginning of cramps (often around the start of bleeding). Taking it early may help reduce symptoms more effectively than waiting until pain is severe.

3) How long can I take Ponstel?

Use it for the shortest effective time. Do not continue beyond the duration specified in the product instructions or longer than advised. If symptoms persist, seek medical advice.

4) Can I take Ponstel with food?

Yes. In fact, it’s often recommended to take mefenamic acid with food or milk to reduce stomach irritation.

5) Can I drink alcohol while taking Ponstel?

It’s best to avoid alcohol or keep it to very small amounts, because alcohol combined with NSAIDs can increase the risk of stomach irritation and bleeding.

6) Can I take it with ibuprofen or other NSAIDs?

Generally, avoid combining NSAIDs (such as ibuprofen, naproxen, diclofenac) unless specifically directed by a healthcare professional, because this increases the risk of gastrointestinal and kidney side effects.

7) What if I forget a dose?

Take it when you remember unless it is close to the time for your next dose. Do not take a double dose.

8) Who should not use Ponstel?

You should be cautious and seek advice if you have a history of NSAID-induced asthma, stomach ulcers or bleeding, significant kidney disease, or if you take medicines that increase bleeding risk (such as anticoagulants). Always check the patient information leaflet and talk to a pharmacist if unsure.

9) Are there warning signs I should watch for?

Yes. Stop and get urgent medical help if you notice symptoms such as black stools, vomiting blood, severe abdominal pain, swelling of the face/lips, wheezing, or reduced urine output.

10) What are the alternatives if Ponstel doesn’t suit me?

Alternatives may include paracetamol, another appropriately chosen NSAID (if safe for you), or non-medicinal approaches for menstrual pain. The best option depends on your medical history and other medicines.

Important: This information is designed to help you understand how Ponstel works and how to use it safely. Always read the patient information leaflet supplied with your medicine and follow the instructions on the pack. If you have questions about suitability or interactions with your current medicines, speak to a pharmacist.