There are no legal antibiotics sold over the counter in the US.
I'm sorry, but diagnosing yourself is not a good thing. If you think you have an infection, you should call the doctor's office. Ask if they have a sliding scale for patients whose income is not within the realm for total payment.
I should have specified that I was looking for a topical remedy. After some research I settled on neosporin for now. If I don't see improvement in a week or so I'll see what I can do to get to the doctor's.
There is no such thing as a super-duper topical antibiotic sold O-T-C. However, the old standbys, Polysporin (bacitracin/polymixin) and Neosporin (bacitracin/neomycin/polymixin), are reasonably good antibacterial topicals and in some cases, actually work as well or better than comparable Rx-only topicals. However, topicals are intended for superficial (i.e., on the surface) infections and OTC versions are available in ointment (petrolatum-based) form only. The cream versions do penetrate more effectively below the surface of the skin but are available only on Rx to prevent patients from self-diagnosis of potentially serious problems which can delay requisite treatment. Generic versions of Neosporin can often be found in dollar stores if you want to try it but if you don't see improvement within a short time, seeing a doctor is your safest alternative.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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