I am almost 42...have been having trouble with irregular cycles for some 3 years now. Was recently told by my doc. to try prometrium for 10 days in hopes of jump starting my cycle. I feel miserable from lack of missed cycles, and was wondering if any one has had my situation and tried this treatment? If so , what can I expect? I don't have any side effects to speak of..so far anyways! I am new to this board, but feel very lost in this new adventure I seem to be entering. So many questions! Thanks! Susan