Hi! Oo, common side effects usually ang irregular bleeding, spotting, or delayed period for the first few months, a few of us tried it at nag-adjust lang after 3-4 cycles. But kung matagal na yung bleeding mo, sobrang heavy, or may severe cramping, headaches, or dizziness, better check with your OB na para sure if it's not working for your body. Bawat katawan talaga ay different, kaya importante marinig ng doctor kung paano ka sumasabay sa injectable!