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» Scarleteen Boards: 2000 - 2014 (Archive) » EXPERT ADVICE » Ask Scarleteen » Birth control and antibiotics

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Author Topic: Birth control and antibiotics
libertinedreamer
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Member # 37328

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Hi,

I'm not sure if you'll be able to answer me, as this is quite a medical question, but I'm not able to go to the doctors until Monday and I don't know anyone else to ask!

I'm on Femodette and ran the last 2 packs together (with the blessing of my nurse) so I have taken currently about 30 pills.

I've also just got the symptoms of a urinary tract infection. Since I am prone to these despite taking all the advice of peeing after sex etc, the doctor gave me some antibiotics (Nitrofurantoin) which I should take when the symptoms start.

The problem is that around 24 hours ago (before I got any symptoms) I had sex. I know that antibiotics can affect the effectiveness of the pill and that you have to use abstinence or a barrier method during and after using antibiotics. However my concern is if I start taking these antibiotics now there may still be semen in me from the last time I had sex.

So basically my question is:

If you have sex just before taking antibiotics, is there reasonable risk of pregnancy? (By reasonable I mean more than the usual risk of the pill failing)

Thanks!

Jenny

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Heather
Executive Director & Founder
Member # 3

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The class of antibiotics used to treat UTIs are not the class which are suspected to possible interfere with birth control pills.

So, in this situation, there's likely no cause for concern.

But if in doubt, you can always call into your doctor or pharmacist to double-check.

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Heather Corinna, Executive Director & Founder, Scarleteen
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Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it is the only thing that ever has. - Margaret Mead

Posts: 68290 | From: An island near Seattle | Registered: May 2000  |  IP: Logged | Report this post to a Moderator
libertinedreamer
Neophyte
Member # 37328

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That's what I originally thought, but having looked around on the internet I'm more concerned.

I know that I should be wary about trusting internet sources but I found a number of websites saying things like:
Medications (antibiotic and otherwise) that are commonly listed as interfering include ..... Nitrofurantoin

Unfortunately I can't go to the doctors tomorrow as they aren't open on a Sunday, unless I go to A&E which seems rather drastic. Do you think a pharmacist would be able to answer this?

Thanks for the quick reply!

x

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Heather
Executive Director & Founder
Member # 3

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A pharmacist is the very best person to talk to about medication interactions. Mind, their references may say what mine do, but a second opinion is always a comfort and smart.

--------------------
Heather Corinna, Executive Director & Founder, Scarleteen
About Me Get our book!
Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it is the only thing that ever has. - Margaret Mead

Posts: 68290 | From: An island near Seattle | Registered: May 2000  |  IP: Logged | Report this post to a Moderator
   

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