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

Neomycin Sulfate Polymyxin B (also known as Maxitrol) is only available with a prescription.

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.

no

Although there is no medication to remove the cold sore, the polymyxin is an antibiotic which will not work on a viral infection. To help the cold sore, an anti viral medication is needed.