And also you may check for essential oils:
Melaleuca alternifolia (bush tea tree) very very efficient external antibiotic, antifongic, antiviral. External use only, preferably diluted 1 to 10 in another neutral oil, especially on open wounds.
When you start using it, you do not stop for at leat a week, better 2 weeks, else you just build more resistant bugs.
Some other oils can be used internally, depending on affection, including lavender, (lavendula vera), Cypres (cypressus sempervirens)... etc
Some are researched for their skin regeneration effects (helicrhyse) and used in the states on deep burns etc...
Better read a book on it before starting to use them , some are toxic or hepato-toxic, so better not mixt them and take the wrong one, or too much of one.
Like in self prescribing classical chemicals you'd better know what you are doing. In time I find them more efficient than most antibiotics if taken after the first symptoms. With a pannel of 10 oils, you should cover most common affections.
The good thing is you won't need a prescription. The bad thing is better find some that are biologically cultivated and made if you do not want the effects of the distilled pesticided

as well as the distilled oil.