Many years ago, a gynecologist suggested that I use Boric Acid to end my yeast infection. At the time, Monistat, etc, creams were only available with a prescription. I followed her advice with immediate releief. I went to the drugstore and bought a small jar of Boric Acid, which was a white powder, plus I bought some empty glycerin capsules. These had to be special ordered by the pharmacist at the time, but I see them in the drug stores all the time now. I filled the capsules with the boric powder by pushing both ends of the capsule into the powder until it was crammed with the powder, then I pushed both ends of the capsule together to close it. The capsules were NOT injested orally, although it seems now that i may have been able to do this, but instead, they were inserted into my vagina at night, just as you would the Monostat cream. I never knew how many capsules to insert or for how long, and since the name of the product was boric ACID, I was afraid to use too much for fear of burning my interior skin. After that, I rarely got yeast infections, and when I did, this remedy always worked, and for far far less money than going to the doctor and getting a prescription.
I also learned that boric acid is used to get rid of insects and cockroaches ...sprinkle it around the perimeters of the base boards or window sills, ect, anywhere where you see the critters exiting or entering. It's worth a try and not toxic for humans.