I just had a question regarding antibiotics and birth control.
I was on a heavy dose of antibiotics just over a week ago for about 2 weeks. I believe my last antibiotic pill would have been last Sunday morning (possibly even Monday..).
Sunday is the day I started my new pack of birth control. I have been taking my pills at almost the same time everyday, give or take maybe 2 hours late twice within this week (but still within the 3 hour time frame so it's not considered late, right?). I had unprotected sex last night and I'm just wondering if I am still less protected because of the antibiotic use a week ago? I believe that Sunday was also one of the days that I took my BC two hours late, and I think the first pill is the most important to take on time? Don't know if that matters but figured I'd say it all..
How do antibiotics work? Are you only less protected while taking the antibiotics or does it take a long time to clear out of your system, making it possible to get pregnant once done the antibiotics as well? Should I consider plan b, even if I am on BC.. just in case?
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Two hours later than your usual time isn't considered a late pill, so you don't need to worry about that.
What we know about certain antibiotics (and other medications) is that they can interact with birth control. What that means specifically isn't always known. But, since you started your new pack of pills as you were finishing up the cycle of antibiotics, you don't have to worry about that interaction.
-------------------- Robin Posts: 6066 | From: Washington DC suburbs | Registered: Dec 2011
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Okay thanks. So just curious, the whole use back up a week before/after the antibiotics as well does not apply? Just be more careful when on them?
And i don't know if this matters but I had to take a laxative Thursday night. This would have been about 4-5 hours after taking my BC and about 24 hours before unprotected sex. That in combination with the antibiotics, I'm still 100% protected if I have been taking my pills on time since the start last Sunday?
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