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Doctor insights on: Bactrim For Cellulitis

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I am two days late but I am taking bactrim (for cellulitis) and cipro (ciprofloxacin) (for bladder infection). I took a test but it was negative. ?

I am two days late but I am taking bactrim (for cellulitis) and cipro (ciprofloxacin) (for bladder infection). I took a test but it was negative. ?

Pregnancy?: First, if you are taking Bactrim you probably do not need to be on Cipro (ciprofloxacin)floxacin unless you had a urine culture showing an organism resistant to the bactrim. Secondly, you do not want to be on Cipro (ciprofloxacin) if pregnant. There are no immediate known contraindications to Bactrim for pregnant humans in the first trimester. Last, you may be pregnant and not yet have a positive test. ...Read more

Dr. Michael Miller
987 doctors shared insights

Cellulitis (Definition)

A common skin condition that is caused by bacteria. Common symptoms may include fever, a skin sore that appears suddenly and grows quickly, and redness, pain, and tenderness ...Read more


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Day 6 on Bactrim antibiotics for cellulitis on my tush. Is it normal for skin to peel and bleed? Does this mean it's healing ?

Day 6 on Bactrim antibiotics for cellulitis on my tush. Is it normal for skin to peel and bleed?  Does this  mean it's healing ?

Cellulitis: It is normal for the skin to peel with cellulitis. Please send photo to be sure it is not worsening with the bleeding part. Did you mark the area with a black marker to see if injection is extending borders? Send photo asap to help be sure it is not worsening. Do you have any fevers. ...Read more

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prescribed bactrim (sulfamethoxazole and trimethoprim) for cellulitis to take 2 pills BID. have been taking every 12 hours. I've skipped dose and now it's 6hours later. what to do?

prescribed bactrim (sulfamethoxazole and trimethoprim) for cellulitis to take 2 pills BID. have been taking every 12 hours. I've skipped dose and now it's 6hours later. what to do?

Take: Trying to take the medication exactly 12 hours apart is not needed (6-16 hours apart is fine). Take the miss dose now. Give it about 6 hours and take the next dose. Tomorrow get back to a normal schedule. ...Read more

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Prescribed 7days of Bactrim (sulfamethoxazole and trimethoprim) for cellulitis. Today is day 3 and symptoms have improved. Should the redness/pink area be gone completely by day 7?

Prescribed 7days of Bactrim (sulfamethoxazole and trimethoprim) for cellulitis. Today is day 3 and symptoms have improved.  Should the redness/pink area be gone completely by day 7?

Maybe: Sometimes the clinical condition lags a little behind. You might still have some evidence of your infection after antibiotics are gone. Just keep watch for relapse. Good news you are on the mend ! ...Read more

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How high would a child's heartrate go when they have a fever of concern if their sleeping baseline is about 100bpm? (4yo cellulitis, bactrim (sulfamethoxazole and trimethoprim) begun am)

How high would a child's heartrate go when they have a fever of concern if their sleeping baseline is about 100bpm? (4yo cellulitis, bactrim (sulfamethoxazole and trimethoprim) begun am)

Rule of 10's: I generally expect a kid's heart rate to increase 10 beats per minute for every degree of fever above baseline.Activity will add more. Breathing rate follows a rule of 5's, increasing 5 breaths per minute for each degree. Both parameters mark the increase of fuel needed to sustain the work of healing, the fuel being oxygen & the heart pushing it around where its needed. ...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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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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Diagnosed with cellulitis on left shin. Today is 7th day of 10 day Bactrim. Decreased Redness and swelling (2-3" in diameter day 1) do I need 10 days?

Yes, you need to: follow the health care professional's advice to the letter. Stopping early can lead to a rebound that might be much more serious or extensive. You wouldn't want to eventually lose your foot just to save three days of antibiotic therapy! ...Read more

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Cellulitis, high fever, hr and bp. Went to er. Hospitalized, vancomycin, i&d, go home w/bactrim. Could this case have been handled in a cheaper way?

Cellulitis, high fever, hr and bp. Went to er. Hospitalized, vancomycin, i&d, go home w/bactrim. Could this case have been handled in a cheaper way?

Probably not: You were treated appropriately. If you had sought medical help earlier you might have been able to have been treated with out- patient IV or oral antibiotics and avoided costly hospitalization. ...Read more

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Had cellulitis with red streak. Improved with Bactrim (sulfamethoxazole and trimethoprim) over a week and now the red streak is starting to re form. Why is this?

Cellulitis: You are describing what might be lymphangitic spread of the infection- spread through the lymph system which could end up in the bloodstream which is serious. The bacteria may be resistant to bactrim (sulfamethoxazole and trimethoprim) or you may have developed another infection. Get seen right away to change your antibiotics or possibly treat you with intravenous antibiotics. ...Read more

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I have cellulitis. Taking Bactrim (sulfamethoxazole and trimethoprim) and Keflex. Is it necessary to take both? Do they cancel each other out?

I have cellulitis. Taking Bactrim (sulfamethoxazole and trimethoprim) and Keflex. Is it necessary to take both? Do they cancel each other out?

No: They don't cancel each other out. There are times when we feel it is necessary to use 2 antibiotics from 2 different classes (such as Bactrim (sulfamethoxazole and trimethoprim) and Keflex) to cover the infection. I would continue both as your doctor prescribed. ...Read more

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Had cellulitis 6/1, treated 1g rocephin, 10days Bactrim Ds 2 pills BID. On 7/13, I learned I had gonorrhea, sex 13days prior, did he give gonorrhea?

Had cellulitis 6/1, treated 1g rocephin, 10days Bactrim Ds 2 pills BID. On 7/13, I learned I had gonorrhea, sex 13days prior, did he give gonorrhea?

Probably yes: You can be 100% certain you did not have your gonorrhea when you were treated with ceftriaxone (Rocephin) and bactrum; that treatment for sure would have cured gonorrhea. Therefore, you had to catch it sometime later. If your only partner or exposure since then was the one 7/13, that's when you caught it. That partner needs exam, testing, and treatment for gonorrhea. ...Read more

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I went to the ER Monday night and was told I had a bad case of cellulitis. How many days should the bactrim (sulfamethoxazole and trimethoprim) take to stop the stinging?

I went to the ER Monday night and was told I had a bad case of cellulitis. How many days should the bactrim (sulfamethoxazole and trimethoprim) take to stop the stinging?

Treat until better: Sometimes the pain and inflammation of cellulitis takes a few days to go down. That's because of the injury the bacteria have caused. Good that you've been seen by a doctor -but you need follow up care to make sure you are responding well. If you have co-morbid illnesses like diabetes, then you definitely need more care, not less. Try to elevate the area (or stay off it) to help ease the pain. ...Read more

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Went to ED 2 nights ago with spider bite and they diagnosis as abcess with cellulitis. Gave me a tetanus but did not I&d it. Sent me home with bactrim (sulfamethoxazole and trimethoprim) and ?

Went to ED 2 nights ago with spider bite and they diagnosis as abcess with cellulitis.  Gave me a tetanus but did not I&d it.  Sent me home with bactrim (sulfamethoxazole and trimethoprim) and ?

Depends...: The rule of thumb for tx of an abscess is I&D and antibx that's true, however when it comes to practice there a few factors to consider. If it was still hard it cannot be drained. If it is also not too big in my experience using warm compresses along with antibiotics can resolve it. I usually follow up in one or two days and check if then needs drainage. F/u with your provider if not better. ...Read more

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Diagnosed cellulitis 3days ago.bactrim (sulfamethoxazole and trimethoprim) since then not resolvd.been like that 5days lump redness n pain bigger n more. Should it be cut. No white head?

Diagnosed cellulitis 3days ago.bactrim (sulfamethoxazole and trimethoprim) since then not resolvd.been like that 5days lump redness n pain bigger n more. Should it be cut. No white head?

Treatment failure: Symptoms of an illness that will respond to a particular antibiotic usually start to improve within 3-4 days. Most physicians would consider this a treatment failure and either re-diagnose or treat with something else. ...Read more

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I was diagnosed on Monday with cellulitis at ER, i'm allergic to Keflex but they gave me Bactrim (sulfamethoxazole and trimethoprim) is that a problem. I haven't been feeling good since?

I was diagnosed on Monday with cellulitis at ER,  i'm allergic to Keflex but they gave me Bactrim (sulfamethoxazole and trimethoprim) is that a problem. I haven't been feeling good since?

Yes: These drugs are unrelated but the sulfur part of Bactrim (sulfamethoxazole and trimethoprim) not uncommonly causes adverse( and allergic )reaction making one feels that he has the flu (drug fever). Recommend that you contact your doctor immediately to get a substitute. Even if you are allergic to Keflex, you can usually tolerate the 3rd generation cephalosporins (vs Keflex being the 1st generation). ...Read more

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Eyelid abscess with cellulitis for one week. Dr Rx smz-tmp DS and clindamycin 4 days ago. Was ok until bactrim dose today and now very dizzy & nausea.

Bactrim side-effect: Bactrim (TMP/SMX) can cause neurologic side effects - so I would place the blame there. It's extremely important though to notify your doctor - the one who prescribed those antibiotics. Hopefully your infection is well treated enough where you can stop everything. There are plenty of other agents that could be used to fight an infection like that. Stopping before things get worse is important. ...Read more

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What you suppose to do after subcutaneous gluteal cellulitis abscess drainage? On bactrim (sulfamethoxazole and trimethoprim).What to watch out for of side effects also? Thank you drs.

What you suppose to do after subcutaneous gluteal cellulitis abscess drainage? On bactrim (sulfamethoxazole and trimethoprim).What to watch out for of side effects also? Thank you drs.

Wound care: Make sure the wound stays clean and moist, and if it was drained surgically, change the packing at least daily. Watch out for return if the red skin surrounding the area. Watch out for fevers. Make sure to follow up with the doctor that is treating you, or your primary care within a week or so. Sooner if you get worse. Hope this helps! ...Read more

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Do I use basic dial antibac soap 2 clean a lanced abscess from cellulitis? I was told no to hibiclens. I am taking bactrim, (sulfamethoxazole and trimethoprim) silver microbial gel ok??

Do I use basic dial antibac soap 2 clean a lanced abscess from cellulitis? I was told no to hibiclens. I am taking bactrim, (sulfamethoxazole and trimethoprim) silver microbial gel ok??

Yes: it's a very good idea to use dial wash the area, pat it dry and if u were to use the silver gel, use a very thin layer, making certain that u have no silver allergy. ...Read more

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Have cellulitis on my lower abdomen. Had it drained by dr and put on bactrim (sulfamethoxazole and trimethoprim) for 7 days. Could this be MRSA?

Have cellulitis on my lower abdomen. Had it drained by dr and put on bactrim (sulfamethoxazole and trimethoprim) for 7 days. Could this be MRSA?

Yes, maybe MRSA: In otherwise healthy people, non-rectal/genital cellulitis and skin abscesses (that's probably what required drainage) are caused by strep or staph, and many staph infections are MRSA. So it's definitely possible. Bactrim (sulfamethoxazole and trimethoprim) is the recommended antibiotic because it covers them all, including MRSA. Most likely a culture test was done and will tell whether or not it's MRSA. Ask your doctor. ...Read more

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Cellulitis. prescription 2 antibiotics-keflex 4x day /7days & bactrim (sulfamethoxazole and trimethoprim) 2x day/7 days. After 2 days, had bad side fx-doc says stop keflex only. Is this a concern?

Cellulitis. prescription 2 antibiotics-keflex 4x day /7days & bactrim (sulfamethoxazole and trimethoprim) 2x day/7 days. After 2 days, had bad side fx-doc says stop keflex only. Is this a concern?

Antibiotic choice : I would be unable to answer this appropriately. Of course, you could have reacted to either antibiotic. Of course, the physician may already know what bacteria you have and made a choice to change your antibiotic. Careful followup and communication are most important for you over the next week. Did your symptoms improve with the removal of the bactrim (sulfamethoxazole and trimethoprim)? ...Read more

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Is it normal that I have a brown discharge if I took plan b (tues) within the 24 hr window.then thurs.i was prescribed bactrium for cellulitis . ?

Is it normal that I have a brown discharge if I took plan b (tues) within the 24 hr window.then thurs.i was prescribed bactrium for cellulitis . ?

Brown D/C is: old blood being cleaned from the vagina & is likely due to Plan B. Potential Side effects w emergency contraception include menstrual flow changes (spotting, bleeding, early or late period). Take pregnancy test & notify Dr if your period is 7 or > days late. Take care. ...Read more

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I have cellulitis on my knee. It is now the 6th day, 4 of which i have been on bactrin, and it is now a purplish red color and hard. Is that normal?

I have cellulitis on my knee.  It is now the 6th day, 4 of which i have been on bactrin, and it is now a purplish red color and  hard. Is that normal?

Not necessarily.: It sounds as if it's getting progressively worse. If after 48-72 hours after initiating antibiotic treatment and it's not improving, I would go back to your doctor. The bacteria causing the infection may not be respoding. ...Read more

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I have cellulitis from a large gash on my left leg at just below mid shin. I was prescribed Bactrum. When should I see a lessening of symptoms?

I have cellulitis from a large gash on my left leg at just below mid shin.  I was prescribed Bactrum.  When should I see a lessening of symptoms?

Depends: Depending on how large the gash is it could take a while for that to heal. If it was infected then 24- 48 hours after the antibiotics should be a good time to get rechecked by the prescribing doctor or to an urgent care. Good luck ...Read more

Bactrim (Definition)

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