Mefenamic acid
"Hi everyone,

I have used mefenamic acid for period pain twice so far and will probably not be using it again. I will still give it a decent review since it helped a lot with my period pain and lessened the bleeding, but after taking one 500mg tablet the first time (with dinner) I got a stabbing pain in my stomach and severe nausea, however it went away after about an hour. After about 10 hours I started to just take ibuprofene for the rest of the period. Next time my period was a bit early so I had to take M. Acid for the pain again, used it twice with about 10 hours in between, ended up with stomach pain, nausea and diarrhea the next few days (still have it and my period is done). Hope it won't last..."