I took one bactrim for a UTI and have been pumping my breastmilk and tossing it. Wanted to know when it is safe to breastfeed my baby again
How long does bactrim stay in breastmilk?
Question posted by infomeds on 10 Nov 2009
Last updated on 18 November 2009 by Marvell
I realize this answer may be a bit late ...
The mean serum half-lives of sulfamethoxazole and trimethoprim are 10 and 8 to 10 hours, respectively.
It takes 5.5 x half life's for a medicine to be totally eliminated from ones system. Therefore if using the maximum hours as half life, it would take 55 hours (5.5 x 10 hours) at least before Bactrim is eliminated from your system ... so approximately 2.5 days.
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