Ethinyl estradiol / ethynodiol
"I have been on Demulen for two years now and take it daily, without monthly breaks, for the management of severe endometriosis symptoms. I tried many different birth control pills before Demulen, but it has been the most effective in preventing the debilitating pain I suffer. If I am a few hours late with a pill, I will begin to experience some cramping, but I am fine so long as I take it properly. I have experienced no major side effects; no weight gain, no increased sensitivity to the sun, nothing. I would recommend it for the management of endometriosis."