Generally, it takes between seven and 10 hours for a dog to digest food, but the many variables mean that only your vet can tell you how long it should be taking.
But how many days after Provera will your period start? When using Provera for amenorrhea (absence of menstrual periods) or abnormal vaginal bleeding, the medication is taken for 5 to 10 days. Menstrual-like vaginal bleeding usually occurs three to seven days after treatment ends.
Depo-Provera is a contraceptive method for women. Itâs made of a hormone similar to progesterone. It's a shot that a doctor gives you in the arm or buttocks. Each shot works for up to 12 to 14 weeks, but you must get the injection once every 12 weeks to get its full protection.ow Soon Does It Work? Depo-Provera starts to work as birth control immediately after the first shot, if you get it within the first 5 days of your menstrual period.