I will be using Microgestin 1/20 and I was wondering how long it takes for it to work after the first day I take it?
Assuming this is the first time you have taken a birth control pill then it depends on when you start using it.
If you start taking the pill on the first day of your period (day 1) then you have immediate protection from pregnancy.
At any other time you need to wait for 7 days before you are protected.
Have a good read of the package insert - it contains everything you need to know. If you still have any questions talk to your doctor or pharmacist.
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