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Diane 35 as contraceptive method, took wrong pill

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My OB/GYN prescribed me Diane 35 as contraceptive method 4 months ago. I've been taking it regularly without any kind of problem, in fact it has helped me to regularize my period.

Today I accidentally took one of the pills from the end of the blister (not a placebo one) instead of the pill I was supposed to take. After 6 hours of taking it, I checked the blister, realized I've taken the wrong pill and took the pill I was supposed to. I did it based on instincts but now I'm worried it could have affected me in some way (like decreasing it effectiveness). I had sex last night but yesterday I took the right pill at my usual time. This has never happened before, I've never even missed a pill.

Should I be worried about its contraceptive effect being decreased?

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replied February 12th, 2013
Birth Control Answer A42125
Welcome to ehealthforum,
Since all the pills in the pill pack contain the same dosage of hormones, there was no need for taking extra pill after you took the ‘wrong’ pill. You should have continued taking 1 pill daily as instructed. Since you have not missed taking active pill, the efficacy will not be affected. Continue to take the active pills as instructed at scheduled time and avoid missing any active pill intake. Wait and watch for your periods/withdrawal bleeding and start the next pill pack as scheduled. Visit your doctor/gynecologist for further evaluation, clarification and assistance.
Take care.

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