U.S. doctors online nowAsk doctors free
Cleveland, OH
A 28-year-old female asked:

What infections do bactrim (sulfamethoxazole and trimethoprim) treat and how long does it take?

1 doctor answer2 doctors weighed in
Dr. Michael Sparacino
Family Medicine 38 years experience
Gram neg: Bactrim (sulfamethoxazole and trimethoprim) treats gram negative infections. Most commonly bladder infections and some types of diarrhea. Patients usually get better in a few days.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

Similar questions

A 43-year-old member asked:

Will bactrim (sulfamethoxazole and trimethoprim) treat a cat bite infection?

2 doctor answers2 doctors weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
This needs medical: Care now. You may need both antibiotics and tetanus. Please get seen.
A 44-year-old member asked:

How long does it take for bactrim (sulfamethoxazole and trimethoprim) to leave your system?

1 doctor answer2 doctors weighed in
Dr. Michael Ein
Infectious Disease 49 years experience
5 days: The half life of sulfa and trimethoprim vary from 10 to 20 hours. 5 half lives for almost complete elimination so 50 to 100 hours.
A female asked:

Is it ok to take My Zoloft with the Bactrim (sulfamethoxazole and trimethoprim) I am taking for an infection ?

3 doctor answers3 doctors weighed in
Dr. Matt Wachsman
Internal Medicine 37 years experience
Yes: they have no interaction.
A 36-year-old member asked:

How long does bactrim (sulfamethoxazole and trimethoprim) stay in your system?

1 doctor answer1 doctor weighed in
Dr. Michael Ein
Infectious Disease 49 years experience
55 hours: Bactrim (sulfamethoxazole and trimethoprim) contains trimethoprim and sulfamethoxazole. The half life of trimethoprim (time to elimination of half the drug) is 10 hours in healthy people. The half life of sulfamethoxazole is 11 hours in the healthy. A drug is considered eliminated 5 half lives after the last dose was taken. Therefore Bactrim (sulfamethoxazole and trimethoprim) would be eliminated about 55 hours after taking the last dose.
A 31-year-old member asked:

Can bactrim (sulfamethoxazole and trimethoprim) treat mrsa?

1 doctor answer2 doctors weighed in
Dr. Martin Raff
Infectious Disease 57 years experience
MRSA: Local skin lesions are generally easily treated with Bactrim (sulfamethoxazole and trimethoprim) or septra, assuming you are not allergic to sulfa drugs.
Last updated Jun 24, 2014


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.