9 Nov 2009
Yes, Bactrim DS can affect the combined oral contraceptives and reduce its effectiveness.
ADDITIONAL CONTRACEPTION RECOMMENDED: The effectiveness of estrogen-containing oral contraceptives may be impaired by concomitant treatment with antimicrobial agents. It is possible that a small number of women may be more susceptible to contraceptive failure.
Women using oral contraceptives should be advised of the risk of breakthrough bleeding and unintended pregnancy during concomitant antimicrobial therapy. Alternative or additional methods of birth control should be considered during and for at least one week beyond the last dose of short-term antimicrobial therapy, and for at least the initial weeks of long-term antimicrobial therapy when risk may be the greatest.
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
I've taken my birth control pill (Gianvi) on a daily basis as directed and was wondering if my depression medicine (Effexor) could lower the ...
2 answers • 18 Dec 2012
I want to start on One a day multivitamins and it contains Soy. I was wondering if it gonna cancel the affects of Birth control pills. Thank you!
1 answer • 5 Apr 2013
I will be taking bactrim tablets, twice a day, for a week. Because it's an antibiotic, I'm not supposed to drink, my birth control pill ...
1 answer • 5 Aug 2014
About a month ago my doctor put me on Prilosec and Zantac for reflux (have since stopped Zantac and am only on Prilosec every morning). Is there any ...
1 answer • 19 Apr 2015