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How long till Birth Control side effects kick in?

I know it takes 1 month for Birth Control to fully work... but people say you have side effects like Breast Tenderness, Headaches, etc... When do those take effect?

Public Comments

1. My girlfriend started getting those other side effects about two months after she started.
2. Well it takes sometime for the pill to actually work itself through your system and blood stream. Basically the pill tricks your body to thinking its pregnant--in lamen terms. But usually, you will experience those side effects around a month or so. It all depends on your body and how it will react to it.
3. I've been taking BC pills since 1972, never had any side effects, every one is different.
4. It just depends on the person... some people don't get the side effects (or atleast not all of them). Don't worry about it, and hope that you're one of the lucky ones that will never get them! If you do get any side effects, they don't last that long (maybe a couple days) and are no worse than PMS without birth control. Best wishes and good luck!!!
5. You could develop the side effects at anytime. You could be on the pill for 6 months and not have anything and then one day get everything. I took the pill for nearly 6 years and never had any side effects so it just depends on the person. You should be prepared for it to happen anytime. I would say though if you go 1 year with no side effects you can count yourself as relatively safe.