Question: how long does boric acid suppositories last?
Answer: Vaginal boric acid is for use only in the vagina. Do not use this medicine if you have open sores, wounds, or ulcerations in your vaginal area. The usual dosage of vaginal boric acid is 1 suppository inserted into the vagina once per day, for 3 to 6 days in a row. Follow your doctor's dosing instructions.