Here, investigators reported that efficacy measures for skin and scalp were significantly greater for apremilast than for placebo in patients with PsO at baseline. Previously, clinical study data has highlighted that the use of apremilast leads to a reduction in the expression within the epidermis of numerous inflammatory cytokines relevant to PsO. As a result, ESTEEM 1 evaluated the efficacy/safety of apremilast at 30 mg BID for moderate to severe PsO.