“How long does an antibiotic yeast infection last?”

Usually about 3-5days.

You will need an anti-fungal medication from your doctor to get rid of this. It will not go away on its own. Try eating active cultured yogurt twice a day to help with symptoms & then do the same anytime you are on antibiotics. You are more prone to them during their use. Usually one pill does the trick, but a Dr. has to prescribe it.