A clinical diagnosis was made of psoriasis and he was prescribed clobetasol propionate ointment with salicylic acid 6% in petrolatum that should be applied in the evening to his elbows and knees ...
The patient applied a topical multivesicular cream formulation of 6% salicylic acid (Salex, Healthpoint Ltd., Fort Worth, TX) to one foot b.i.d. The physician was blinded as to which foot was treated.