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A member asked:

Hi my doctor wants me to take bactrim (sulfamethoxazole and trimethoprim) ds 800-160mg twice a day for 7days. how long would that take to be out of my system after the 7th day?

1 doctor answer2 doctors weighed in
Dr. Michael Kleerekoper
A Verified Doctoranswered
Endocrinology 52 years experience
800-160: Symptoms from your dosing should stop by day 8! If that is not the case, immediately call your doctor.
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Last updated Nov 28, 2017

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