Colloidal silver.
Is topical
Colloidal silver is an antimicrobial similar to antibiotics except that bacteria do not become resistant to it. We make it and take it all the time. It works great. I currently have my 93 year old mother on it taken orally 3 times daily for a UTI. The doctors cannot find an antibiotic that will work on it.
Colloidal silver can also be used topically.