The bleeding you started today is what we call a "withdrawal bleed." When you finished your five-day course of Meprate (medroxyprogesterone acetate), the hormone levels in your body dropped. This drop signals your uterine lining to shed. While it is technically triggered by stopping the medication, it essentially acts as your period for this cycle. This is a very common, expected response and shows that the medication worked exactly as it was supposed to. Please rest assured this is completely normal. If you experience unusually severe pain or heavy bleeding, do check in with your doctor.