Can you use nitrofurantoin to treat a yeast infection. or can it cause one?

The nitro is NOT going to treat a yeast infection, it is more on the UTI bacterial infection side. You will need an anti fungal treatment for a yeast infection, such as miconazole cream or a diflucan tablet. The miconazole cream can be 1 day, 3 day or 7 day treatment and the cream can be used inside the vagina and on the outside skin also. The diflucan tablets are oral and treat the yeast that is overgrowth of yeast in the vagina and intestines, they treat from the inside out. Yeasts infections can follow antibiotic treatment.