A Comparison Between Clobetasol Propionate 0.05% (Clobex®) Spray and Clobetasol Propionate 0.05% (Olux®) Foam

Inclusion Criteria: * Subjects must have a clinical diagnosis of moderate to severe plaque psoriasis, defined as 3%-20% of the body surface area involved Exclusion Criteria: * Subjects who have surface area involvement too large that would require more than 50 grams per week of Clobex® spray or more than 50 grams per week of Olux® foam * Subjects whose psoriasis involves the scalp, face or groin * Subjects with non-plaque psoriasis or other related diseases not classified as plaque psoriasis