Most of the painkillers for menstrual cramps are effective for about 0.5 hours after taking them, but the pain relief effect of different painkillers is different. Patients with menstrual cramps are better off going to the hospital for a checkup before the symptoms of menstrual cramps appear and consulting a doctor to clarify the role and effect of painkillers can really play in relieving menstrual cramps. The main drugs that can be taken for the treatment of dysmenorrhea are Yuan Hu pain relief tablets or Tian Qi dysmenorrhea capsules, ibuprofen, naproxen, diclofenac potassium, etc. Tian Qi dysmenorrhea capsules belong to the Chinese medicine, mainly to regulate menstruation and pain, dredge the liver and regulate qi, the effect is relatively good, you can rest assured to take. And ibuprofen and other belong to the non-steroidal anti-inflammatory drugs, long-term use may lead to gastrointestinal ulcers.