Assess the Potential for Adrenal Suppression and Systemic Drug Absorption Following Multiple Dosing With DFD-06

The purpose of this study is to evaluate the potential of DFD-06 to suppress the hypothalamic-pituitary-adrenal (HPA) axis when applied twice daily for 15 days.

This is a 15-day, single arm, multicenter, multi-dose, open-label, two stage, sequential study. In the first stage, subjects who are at least 12 years of age and not more than 16.9 years (16 years and 11 months) of age with moderate to severe plaque psoriasis will be treated with DFD-06 (at least 20 completed subjects). In the second stage subjects who are at least 6 years of age and not more than 11.9 years (11 years and 11 months) of age with moderate to severe plaque psoriasis will be treated with DFD-06 (at least 20 completed subjects). An attempt will be made to enroll subjects throughout the age range of each cohort including the lower age range. DFD-06 will be applied twice daily to all affected areas on the body excluding face, scalp, groin, axillae and other intertriginous areas. Subjects must have ≥10% Body Surface Area (BSA) treated to achieve maximal use exposure.