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Doctor insights on: Bactrim Ds Dosage For Mrsa

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Dr. Michael Ein
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Mrsa (Definition)

MRSA, methicillin-resistant Staphylococcus aureus, is a certain strain of bacteria that is resistant to several antibiotics. It most commonly causes skin infections and abscesses, ...Read more

Dr. Stephen Scholand
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My doctor prescribed me bactrim ds for mrsa. The directions are 2 twice a day. Is that a normal dose?

My doctor prescribed me bactrim ds for mrsa. The directions are 2 twice a day. Is that a normal dose?

Yes, it can be: For MRSA (methicillin resistant staph aureus) infections, 2 ds (double strength) tabs 2x per day are often an appropriate dose. This dose is used in adults and is typically based on weight and size of the patient. Mrsa is not an infection to take lightly and properly treating this is very important. ...Read more

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I was just diagnosed with ca-mrsa and i'm scared since it is often resistant to drugs. I just started bactrim ds tonight. What are the chances of it not responding to any drug? How can you know if it's caught early enough? Thank you!

Partially resistant: Ca MRSA is not particularly worse than having regular staph infection. It is not related to the flesh eating bacteria scare. The choice of antibiotics is limited, but generally the infection is sensitive to at least a few of the mainstream antibiotics of which Bactrim is one. If your doctor thought you were at great risk you would not be at home. ...Read more

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I was told I had MRSA and put on bactrim ds for 10 days, twice a day. After wanting to confirm dx, the dermo did a culture and it showed nothiing! dermo thinks its just back acne. He told me to finish bactrim then he will start me on doxycycline. Is that

I was told I had MRSA and put on bactrim ds for 10 days, twice a day. After wanting to confirm dx, the dermo did a culture and it showed nothiing! dermo thinks its just back acne. He told me to finish bactrim then he will  start me on doxycycline. Is that

Sounds good: Mrsa is a scary bug but there a great many different strains and many folks harbor them on their skin with no harm. A physician seeing someone with one or more pimples may feel obligated to biopsy for MRSA and treat it as such since it's by far more serious even if it's not really present. It sounds like your dermatologist made the right move. ...Read more

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My 16yo has a MRSA infection is taking bactrim ds for 8.5 days (prescribed for 10) and using clindamycin gel . She has stomach pain, continue meds?

MRSA: Answers on healthtap aren't intended for individual treatment, prescription or diagnosis. This should be asked of and discussed with the doctor who prescribed the medication for the mrsa. Although this may be a reaction to medication it may be something entirely different. Good luck. ...Read more

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I was diagnosed with MRSA on 11/08/13 and given bactrim but its not going away and i now have a new infected boil?

I was diagnosed with MRSA on 11/08/13 and given bactrim but its not going away and i now have a new infected boil?

Drainage: Antibiotics won't treat boils. They need to be opened and drained. You should see your doctor it go to an emergency room or urgent care center. ...Read more

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Culture of leg taken AFTER doc already treated it for MRSA w/Bactrim & top antib; test then back neg (false neg?). Antib in sys how lg? Retest when?

Culture of leg taken AFTER doc already treated it for MRSA w/Bactrim & top antib; test then back neg (false neg?). Antib in sys how lg? Retest when?

Test of cure: Cultures are often taken following treatment of an infection to confirm that they were cured with the chosen antibiotic. Persistent symptoms after treatment with a negative bacterial culture is suggestive of another type of infection, such as fungal or viral. ...Read more

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MRSA test came back negative, but may be false neg. How soon can someone retest if they were on Bactrim and topical antibiotics PRIOR to test/culture?

MRSA test came back negative, but may be false neg. How soon can someone retest if they were on Bactrim and topical antibiotics PRIOR to test/culture?

Negative MRSA: We usually hope after treatment with Bactrim / topical antibiotics that we have eliminated MRSA, so retesting 3-5 days after stopping antibiotics should yield a negative result. If one is a carrier you test the nasal swabbings for MRSA. That requires longer term -6 weeks for intranasal mupirocin as treatment . Also sometimes house pets can be carriers and repeatedly infect their owners. ...Read more

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