Store shampoo 2% at or below 25 C (77 F) and protected from light. Store cream and foam at room temperature, 20 C to 25 C (68 F to 77 F). Store gel between 15C to 30 C (59 F to 86 F). Summary Ketoconazole (Nizoral, Extina, Xolegel, Kuric) is an anti-fungal medication pr...