Planned Parenthood (or any doctor) can prescribe treatments stronger than miconazole (active ingredient in Monistat 1, 3, and 7 day treatments) and clotrimazole, the
two OTC antifungals available for treating
yeast infections. Typically, you'll get a prescription for one dose of fluconazole, taken orally, which should take care of the yeast infection, though symptoms don't immediately disappear.