Mefenamic Acid 500mg Tablets for Period Pain (28 Tablets)
Mefenamic Acid helps relieve period pain and menstrual discomfort. Complete a short online clinical assessment and, if suitable, your treatment will be prescribed by one of our qualified UK prescribers.
• Quick online clinical assessment
• Reviewed by a qualified UK prescriber
• Treatment supplied where clinically appropriate
• Prompt, discreet UK delivery
Clinical Information
Mefenamic Acid belongs to a class of medications called Non-Steroidal Anti-Inflammatory Drugs (NSAIDs). Unlike standard painkillers, it works specifically by blocking the production of prostaglandins—the natural chemicals responsible for causing intense uterine contractions and painful cramping during menstruation. It is widely prescribed in the UK to manage heavy, painful periods effectively.
NSAID (Prostaglandin Inhibitor)
Reduces severe uterine cramping and heavy menstrual flow.
Online assessment required by a registered UK prescriber.
Dosage & Administration Guide
To safely manage menstrual pain, take Mefenamic Acid exactly as instructed by our clinical team:
- Standard Dosage: The typical dose is one 500mg tablet taken three times daily, starting at the very onset of your period pain or bleeding.
- Administer with Food: To minimize stomach upset, always swallow the tablets whole with a glass of water immediately after a meal, snack, or drink of milk. Do not crush or chew them.
- Duration: Only use this medication for the first few days of your menstrual cycle when pain is at its peak. Do not exceed the prescribed dose or extend treatment without clinical consultation.
Important Patient Safety Details
Please review these critical NHS safety warnings carefully. Your health history will be validated during the medical questionnaire to minimize side effects.
- Stomach & Bowel Health: Do not take Mefenamic Acid if you have a history of stomach ulcers, gastrointestinal bleeding, or active inflammatory bowel disease (Crohn's or Ulcerative Colitis). Stop taking it immediately if you develop severe indigestion or dark, tarry stools.
- Asthma Alert: If you have a history of asthma that is worsened by taking aspirin, ibuprofen, or other NSAIDs, this medication may not be suitable for you.
- NSAID Duplication: Avoid taking Mefenamic Acid alongside other oral NSAID painkillers (such as Naproxen, Ibuprofen, or high-dose Aspirin), as doing so increases the risk of stomach irritation. It is safe to take with Paracetamol if additional relief is required.
- Pregnancy Warning: Mefenamic Acid must not be taken if you are pregnant, planning to become pregnant, or breastfeeding unless explicitly authorized by your doctor.