Safety, Tolerability and Pharmacokinetics of MK-0873 Following Patch Application in Healthy Participants and Psoriasis Participants (MK-0873-020)

This study will evaluate the incidence of erythema and other local cutaneous irritation after administration of MK-0873 by patch or cream formulation in healthy participants and participants with mild psoriasis. Part I and Part II in healthy participants will be initiated prior to Part III in psoriasis participants. The primary hypotheses of the study are: 1) that MK-0873 is safe and well tolerated in healthy participants and participants with psoriasis and 2) that the maximum plasma concentration of MK-0873 is \<20 nM in healthy participants and participants with psoriasis.