- Participant has received systemic psoriasis therapy (such as psoralen and ultraviolet A [PUVA] light therapy, cyclosporine, corticosteroids, methotrexate, oral retinoids, mycophenolate mofetil, thioguanine, hydroxyurea, sirolimus, azathioprine) or phototherapy (including ultraviolet B or self-treatment with tanning beds) within the previous 4 weeks; or had topical psoriasis treatment within the previous 2 weeks prior to randomization (exception: class 6 [mild, such as desonide] or 7 [least potent, such as hydrocortisone] topical steroids will be permitted for use limited to the face, axilla, and/or genitalia)