Hi My Name Is Fayaz, My Question Is That My

Hi my name is Fayaz, my question is that my wife had gone through LsCs in February 2015 and gave birth to baby since then she had irregular menstrual period.The doctor treated her frequently.for last three months she is taking drone-30 tablets.The doctor suggests to take this tablet for at least three months...could i know should my wife stop taking this tablet or not and any side effect.