In one study, a single douche with 20 ml of a 3% hydrogen peroxide was significantly less effective than a single 2 g oral dose of metronidazole.

(The same is true of other disinfectants, such as alcohol and iodine.) That rarely causes ... as effective at preventing infection as hydrogen peroxide. And it's less irritating to the wounded ...

The reaction of hydrogen peroxide with potassium iodide is demonstrated in a tall cylinder. Saturated potassium iodide is added to a mixture of soap, glycerin, water, and hydrogen peroxide. Oxygen and ...