Top answers from doctors based on your search:
Disclaimer

How long does sulfamethoxazole take to work

A 19-year-old female asked:
Dr. Dan Fisher
26 years experience Internal Medicine
48 hours?: Starts killing right away, but sx may remain for a few days. A slight discomfort is still possible at 48 hours. Generally should continue to get bet ... Read More

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
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month
A 19-year-old female asked:
Dr. PHILLIP KIM
14 years experience General Practice
Depends: Septra (sulfamethoxazole and trimethoprim) is a pretty good abx for uti, but sometimes there are causes to which septra (sulfamethoxazole and trimetho ... Read More
1
1 thank
A 34-year-old female asked:
Dr. Charles Gordon
Specializes in Adolescent Medicine
Bacterial sensitivit: You seem to have an infected lymph node. Statistically the most common organism is staph. aureus which is killed by a penicillin class antibiotic. I ... Read More
1
1 thank
A 21-year-old female asked:
Dr. James Ferguson
45 years experience Pediatrics
A day or so: The time for 1/2 to leave your system is listed as 10 hours, followed by 10 hours for half the remainder & so on.By the end of a day or so it is at mi ... Read More
1
1 thank
A 24-year-old female asked:
Dr. Richard Williams
17 years experience Pharmacy
Depends: I hate giving that type of answer but unfortunately it is appropriate here. In general it would take approximately anywhere from 18 hours to 2 1/2 -3 ... Read More
1
1 thank
A 47-year-old member asked:
Dr. Stephen Daquino
20 years experience Sports Medicine
Pretty quick: If your treating a susceptible bacterial infection you will usually see a pretty significant improvement in the first few days. Some infections of c ... Read More
A 44-year-old member asked:
Dr. Michael Ein
47 years experience Infectious Disease
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 28-year-old female asked:
Dr. Michael Sparacino
36 years experience Family Medicine
Gram neg: Bactrim (sulfamethoxazole and trimethoprim) treats gram negative infections. Most commonly bladder infections and some types of diarrhea. Patients u ... Read More
4
4 thanks

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
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month