Prasaplai

 Prasaplai is a herbal medicine on the national list of essential medicines. The ingredients in the recipe are hot herbs that help expel wind and help blood flow easily.
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  and has the property of inhibiting prostaglandins From the research study, it was found that the medicinal formula effective to actually reduce menstrual pain
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- effective compared to modern medicine can be substituted And no serious side effects from the drug such as bloating, nausea, vomiting, dizziness were not found.

thanks for the source
1. Faculty of Medicine Siriraj Hospital Mahidol University
2.Department of Thai Traditional and Alternative Medicine
3.Thammasat Medical Journal.