What Are The Side Effects Of Long Term Use Of Meprate ?

Hi I was using meprate back in 2012 n dn i gt normal menses. But then again aftr a year or so the delay started so I consulted other doc n there was chng in medical prescription. But i think that the new medicine is not that effective. So i just want to confirm that whether i cb start using meprate or will it have any side effects now. Please suggest me. Thanks