Boric acid helps to promote the proper acid balance in the vagina. It is used to help treat yeast infections, BV and relieve symptoms such as itching and burning. Includes 25 capsules. Do not exceed 3 days consecutively without consulting your doctor. Wash your hands before and after inserting a vaginal suppository. You may see some improvement in as little as one day, but you should complete the full course of medication to ensure that the infection doesn't return. If your infection is particularly acute, consider inserting capsules twice daily into the vagina.