amenorrhea
"Prescribed by my gynecologist to treat amenorrhea and long, heavy periods as a result of anovulation (I have polycystic ovarian syndrome which causes anovulation). Due to the anovulation, I would go several months without a period only to eventually have a period which would last anywhere from 14-35 days. The period would be much heavier than the norm, especially for the first 7-10 days. I would also have very large clot-like discharge. I take Prometrium for 21 days, then off for 7 days(which brings on my period). The only significant side effect has been hot flashes during the day, usually in the late morning I will have one bad one with profuse sweating. Then usually one in the afternoon but it's not as bad."