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Doctor insights on: How Long To Get Bactrim Out Of System

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

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

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. ...Read more

Bactrim (Definition)

Trimethoprim and sulfamethoxazole, cotrimoxazole is a combination antibiotic that is used to treat a ...Read more


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

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

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. ...Read more

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How long does it take for bactrim (sulfamethoxazole and trimethoprim) to leave your system after taking your last pill. I am still having intermittent adverse reactions 8 days later.

Several days: It takes a few days to leave your system but that doesn't mean you can't have adverse reactions after that. Ask your question again and detail your symptoms. ...Read more

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How long after taking my last Bactrim (sulfamethoxazole and trimethoprim) is it safe to drink alcohol? How long after last dose does it stay in your system?

How long after taking my last Bactrim (sulfamethoxazole and trimethoprim) is it safe to drink alcohol? How long after last dose does it stay in your system?

50 hours: The half-life of Bactrim (sulfamethoxazole and trimethoprim) is about 10 hours. A drug should be completely out of your system after 5 half-lives; therefore, Bactrim (sulfamethoxazole and trimethoprim) should be out of your system within 50 hours or just over a day. Alcohol can interact with Bactrim (sulfamethoxazole and trimethoprim) and cause some unpleasant side effects such including: fast heartbeats, warmth or redness under your skin, tingly feeling, nausea, and vomiting. ...Read more

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I get insomnia from bactrim (sulfamethoxazole and trimethoprim) ds 800-160. How long after taking a pill might this impact me?

I get insomnia from bactrim (sulfamethoxazole and trimethoprim) ds 800-160.  How long after taking a pill might this impact me?

See answer: The half-life of a drug is the time it takes for a drug to lose half (50%) of its pharmacologic or physiologic properties. The half-life of the two drug ingredients in Bactrim (sulfamethoxazole and trimethoprim) are 8 and 10 hrs. Therefore, after 5 half-lifes or 40 and 50 hrs for the 2 drugs, 97% of the drugs will be out of your system (~2 days). One would expect any related insomnia to be short? ...Read more

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Use Bactrim (sulfamethoxazole and trimethoprim) 2x for 5 days-UTI. Last dose. Urine checked today, no infection but still have some lower back & pelvic pain. How long until i get relief?

Use Bactrim (sulfamethoxazole and trimethoprim) 2x for 5 days-UTI. Last dose. Urine checked today, no infection but still have some lower back & pelvic pain. How long until i get relief?

Needs evaluation: If your pain were caused by a bladder infection then it should be better by now. There are two possibilities. 1. Your infection was not sensitive to the antibiotic Bactrim (sulfamethoxazole and trimethoprim). This seems unlikely since your urine test today was normal 2. Your pain is caused by something else. This is more likely. Follow up with your physician is warranted. ...Read more

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Will taking bactrim (sulfamethoxazole and trimethoprim) suspension for 10days for a UTI negatively affect my immune system or the good bacteria in my gut? I am a 19yo male

Will taking bactrim (sulfamethoxazole and trimethoprim) suspension for 10days for a UTI negatively affect my immune system or the good bacteria in my gut? I am a 19yo male

Not particularly: Any antibiotic you take will kill off any germ that is sensitive to it. That is in the gut or in your infection. Simply taking a probiotic or eating probiotic yoghurt will replenish what are killed. It has no other effect on your immune system. ...Read more

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If i take one bactrim, how long before i can take cipro (ciprofloxacin) again?

If i take one bactrim, how long before i can take cipro (ciprofloxacin) again?

Now: Cipro (ciprofloxacin) and Bactrim are both anti-biotics. They could potentially be taken at the same time. Why 1 bactrim? If you are treating a urinary tract infection often, the Cipro (ciprofloxacin) would be sufficient. This treatment should not be without medical supervision, please consult your prescriber or pharmacist for further assistance. ...Read more

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Can you get a rash while taking Bactrim (sulfamethoxazole and trimethoprim)?

Can you get a rash while taking Bactrim (sulfamethoxazole and trimethoprim)?

Bactrim (sulfamethoxazole and trimethoprim): Yes, a rash could develop while taking Bactrim (sulfamethoxazole and trimethoprim). Please tell your physician if that occurs. ...Read more

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Bactrim ds 800.2x daily for cellulitis. How long before improvement. I'm on day 3. If I were to have an allergic reaction would I know by now.? Ty

Bactrim ds 800.2x daily for cellulitis. How long before improvement. I'm on day 3. If I were to have an allergic reaction would I know by now.? Ty

Yes,: However, there are still chances of developing allergic reaction later, but would be small and mild as time goes by. Regarding improvement, it depends on site, size, general condition, drugs used, etc, in general, if no improvement after few days, the management plan should be revisited, best wishes ...Read more

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How long after starting bactrim will it take for a uti to clear up? I'm going on day 3 and it still feels like my bladder isn't emptying completely.

How long after starting bactrim will it take for a uti to clear up? I'm going on day 3 and it still feels like my bladder isn't emptying completely.

Resistant germs: If you are not getting better from these antibiotics, I would worry about the germ being 'resistant'. This is an increasingly common problem these days- for multiple reasons... I would DEFINITELY check back with the doc who ordered the medication-hopefully they did a urinary culture, which would serve as a guide to the best therapy. You should be better by now. I would drink LOTS of water too ...Read more

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I'm on depo provera (medroxyprogesterone) I recently took antibiotic (BACTRIM).How long to wait until my shot kicks back in due to less effectiveness from the antibiotics ?

Don't worry!: Since depoprovera is progestin based, antibiotics do not interact with it. Relax! See http://www.mckinley.illinois.edu/handouts/depo_provera.html ...Read more

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I went to dr yesterday and found out I have kidney infection. How long before i start improving. I'm hurting in my stomach, back. Taking bactrim (sulfamethoxazole and trimethoprim). ?

I went to dr yesterday and found out I have kidney infection. How long before i start improving. I'm hurting in my stomach, back. Taking bactrim (sulfamethoxazole and trimethoprim). ?

Pyelonephritis: As long as the bacteria causing the infection is sensitive to Bactrim (sulfamethoxazole and trimethoprim) you should be improving soon. If you have vomiting or unrelenting pain it is a good idea to notify your physician. Some patients who develop kidney infections require in hospital management with IV antibiotics if they are unable to tolerate the oral treatment or have progression on oral antibiotics. ...Read more

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I had a UTI in November ,took Bactrim/Co - Trimoxazole DS. Possible to get meds without test ?

I had a UTI in November ,took Bactrim/Co - Trimoxazole DS. Possible to get meds without test ?

Try HealthTap PRIME: HealthTap PRIME doctors see and treat you, via smartphone, tablet, or laptop. They can see photos you upload into your FILES. PRIME can be accessed from anywhere in the world, and patients just have a monthly subscription fee. Sometimes a prescription for a UTI can be done on PRIME, but sometimes it cannot (depends on the individual circumstances). Fees are the same with or without a prescription. ...Read more

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Can I take a probiotic while on Bactrim (3 day treatment)? If so, how should I time the doses of the probitoics (how long before or after Bactrim)?

Can I take a probiotic while on Bactrim (3 day treatment)? If so, how should I time the doses of the probitoics (how long before or after Bactrim)?

Yes: Ok to take probiotic. Can take it any time will not interact with Bactrim. Follow the OTC (over the counter) pharmacy label directions for best use. ...Read more

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Got bit by a brown recluse on my back went to the er was put in bactrim and was told to watch the site for further progressions how long will this las?

Got bit by a brown recluse on my back went to the er was put in bactrim and was told to watch the site for further progressions how long will this las?

Serious sting: Brown recluse spider bites can lead to very serious after effects. If indeed you were stung by a brown recluse spider you may experience progressive local necrosis or something equally bad. I would strongly advise you to ask your primary care physician to refer you to a infectious disease specialist for a second opinion very soon. ...Read more

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Been taking bactrim started swelling in stomach how long after taking Med does swelling go down.

Been taking bactrim started swelling in stomach how long after taking Med does swelling go down.

Not sure.: Bactrim is an antibiotic and does not cause or reduce any swelling that is not related to infection. Generally infection large enough to cause visible swelling is quite serious and not subtle. I suggest that your swelling may be due to something else. ...Read more

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Do I have to wait between taking kelfax, bactrim, and dulcolax, or can I take them all close to the same time? Also taking aspirin. If yes how long.

Do I have to wait between taking kelfax, bactrim, and dulcolax, or can I take them all close to the same time? Also taking aspirin. If yes how long.

Recommend: Not sure what keflax is maybe Keflex? an antibiotic.
Can take meds all at same time. Should be OK.
Dulcolax is a laxative. Take at bedtime to have a BM in the morning for convenience.
Otherwise all seems to be fine to take together. ...Read more

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With cellulitis (child), how long after oral antibiotx start should we see less symptoms? (swelling, redness, warmth in arm) (bactrim)

With cellulitis (child), how long after oral antibiotx start should we see less symptoms? (swelling, redness, warmth in arm) (bactrim)

24-48 hours: It takes some time for the meds to work. Initially, antibiotics first stop the spread of infection before symptoms abate. ...Read more

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How long should I wait to drink after taking bactrim (sulfamethoxazole and trimethoprim)?

How long should I wait to drink after taking bactrim (sulfamethoxazole and trimethoprim)?

Alcohol?: If you are wanting to drink alcohol you really should finish your medication first. I generally discourage alcohol consumption when i prescribe any medication. All other fluids should be fine. ...Read more

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If I take Ibuprofen and don't get Steven-Johnson syndrome, does that mean I'll get it while on Bactrim?

MUST you get SJS????: SJS is rare. Sometimes it is a reaction to a med. No, if you do not get it from 1 med., you are not likely to get it from any other med. Because it is rare. That means most Drs have never seen it. WHY are you obsessed about it? ...Read more