Boric acid is a natural antifungal and antibacterial treatment that can help treat yeast infections.

It works by regulating the pH of the vaginal canal to keep it at a healthy level. It can also be used to treat symptoms of a yeast infection such as itching and swelling, says Dr. Minkin, who is a board-certified gynecologist and founder of Love Wellness.

The  vaginal suppository boric acid are available at drug stores and online retailers without a prescription, but it’s important to speak with your healthcare provider before starting a new supplement. They can help you get started on a treatment regimen that will work for you and your specific situation.

The Pros and Cons of Using Boric Acid Supplements

If you have a history of STIs or pregnancy, you should avoid taking this medication. It might break down your condoms and diaphragms, which can make your vaginal symptoms worse.

Your provider can prescribe a more effective treatment to get rid of your infection. You might need to use other medications or a combination of medications.

Using boric acid vaginal suppositories may break down some blood thinners, such as warfarin (Coumadin), so you should talk with your provider before you take it if you are taking these medicines.

Don’t take boric acid if you are pregnant or breast-feeding, because it can increase your baby’s risk of birth defects. Excessive doses of intravaginal boric acid during pregnancy have been linked to fetal weight reduction and malformations in mice, rats, and rabbits.