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polymyxin can damage other living cell membranes, but since the top layer of your skin is composed of mostly dead, it's safe to use on it.

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Q: Why is polymyxin only used on the skin?
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What is polymyxin-b sulfate?

Polymyxin-b sulfate is an antibiotic that is primarily used for resistant Gram-negative infection.


Can you buy neomycin sulfate polymyxin B?

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Does Neomycin or Polymyxin B have penicillin in it?

Polymyxin B does not have penicillin in it, I just called my local pharmacy to ask that question and the answer is no. I should note, however, that the reason I called my pharmacist was because I used a topical ointment that contained Polymyxin B and had a very severe allergic reaction immediately after applying the ointment. I have anaphylaxis to penicillin and thought it may contain penicillin, but the pharmacist tells me it does not. He did advise me to go see my allergist again as I may have developed an allergy to another antibiotic but assured me there is no penicillin in Polymyxin B. Can't help with Neomycin, sorry!


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I was prescrived Bausch & Lomb Polymyxin B Sulfate and Trimethoprim Ophthalmic Solution USP for dry eyes. I just started with the drops today and I sure hope it helps.


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Can you use neomycin and polymyxin b on your dog?

My vet prescribed Fougera brand Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment USP for use in my dog when she had an eye infection.


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