Probiotics are often taken with oral antibiotics to help prevent nausea and diarrhea induced by killing off the "good" along with the bad bacteria within the digestive tract. It is now known that just as with the digestive tract, the sinuses also require "good" bacteria to remain healthy. With too much antibiotic use, the sinuses become depleted of all the good bacteria allowing for the bad germs to trigger another sinus infection leading to a cycle of recurrent sinusitis …