Ketoconazole: Nizoral shampoo or cream?

[Kirby_]

Using Nizoral for the last few monthsIt's great stuff, but I'm wondering, am I better off using Nizoral cream, or any equivalent Ketoconazole 2% creams in terms of effectiveness? If I switch to creams, is there anything I'd need to keep in mind, e.g. does it dry out hair or scalp more than the Nizoral shampoo?