Mefenamic Acid

What is Mefenamic Acid used for?

Mefenamic acid is a nonsteroidal anti-inflammatory drug used to relieve mild to moderate pain, including menstrual cramps, headaches, muscle pain, toothaches, and joint pain. It works by reducing inflammation and blocking the production of substances in the body that cause pain and fever. It’s commonly used for short-term relief and is often prescribed during menstruation to reduce period pain and heavy bleeding.

How and when to take Mefenamic Acid?

Mefenamic acid is usually taken three times a day, with a gap of about 8 hours between doses. It should be taken with food or after a meal to reduce the risk of stomach irritation. Swallow the tablets whole with a glass of water, and avoid lying down immediately after taking them. Only use it for short-term relief, and follow your doctor’s instructions carefully—especially if you’re using it for menstrual pain, where it’s often started at the first sign of your period and continued for a few days.

How long does Mefenamic acid last?

Mefenamic acid typically starts working within 1 to 2 hours after taking it, and its effects can last for about 6 to 8 hours. That’s why it’s usually taken three times a day for pain relief. The full course depends on what it’s being used for, but it’s generally meant for short-term use, often just for a few days, especially during menstruation or acute pain episodes.