40 mg/10 mg of migrafin P The purpose of capsules is to prevent migraines. 40 mg/10 mg of migrafin P Capsules inhibit the aberrant muscle activity that causes migraines and assist to increase blood flow to the brain. Although it is a very good medication for avoiding migraine attacks, it cannot cure an attack that has already begun. The medication can help you carry out your everyday activities and enhance your quality of life by preventing and decreasing the frequency of migraine attacks.