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.
medroxyprogesterone (provera) has a half-life of about 30 hours...meaning every 30 hours the dose still in your body is cut in half...for ex if you take 10mg then 30 hours latâ¦er there will be 5 mg in your system, 30 hours after that there will be 2.5 mg in your system etc continuing until there is 0.