Hydrogen Peroxide
I have used 3% H2O2 regularly for many years very successfully.
I inhale it and it improved my lung capacity (I am a smoker) substantially
from 70% to 95%, not bad for someone in their 70's
(for inhaling instructions check the net "inhaling H2O2")
for cuts and abrasions and they heal really fast
to clean my ears very effectively with a few drops
I also clean my teeth with H2O2 and Sodium Bicarbonate (Baking Powder)
Yes, it might destroy adjacent healthy tissue very very marginally.
However it is so little, if any, that it is not worth worrying about
and I have not noticed any alleged destruction of my gum tissue.
Just one piece of advice: "Don't tell your GP"
He will just think you are insane for not taking an antibiotic or some other
much more expensive pharmaceutical drug with their well known side effects.
They think because it is so cheap it can't possibly be any good.
Oh yes, don't tell your friends either they are likely to have the same mindset.