To evaluate the therapeutic equivalence and safety of halobetasol propionate and tazarotene topical lotion 0.01%/0.045% (Taro Pharmaceuticals U.S.A., Inc.) and Duobrii® Lotion (halobetasol and tazarotene lotion), 0.01%/0.045% (Reference Listed Drug) in the treatment of moderate to severe plaque psoriasis.

A Multi-center, Double-Blind, Randomized, Placebo Controlled, Parallel-Group Study, Comparing Halobetasol Propionate and Tazarotene Topical Lotion 0.01%/0.045% (Taro Pharmaceuticals U.S.A., Inc.) and Duobrii® Lotion (Halobetasol propionate and tazarotene lotion), 0.01%/0.045% (Reference Listed Drug) in the Treatment of Moderate to Severe Plaque Psoriasis.

Inclusion Criteria:

• Healthy male or non-pregnant female aged ≥ 18 years
• Subjects must have provided IRB approved written informed consent
• Subjects must be willing and able to understand and comply with the requirements of the protocol, including attendance at the required study visits
• Subjects with a clinical diagnosis of stable (at least 6 months) plaque psoriasis involving at least 3% and no more than 12% of the body surface area (BSA). Affected areas should not include the axillae, face, scalp, soles, palms, and intertriginous areas

Exclusion Criteria:

• Female Subjects who are pregnant, nursing or planning to become pregnant during study participation.
• Females of childbearing potential who do not agree to utilize an adequate form of contraception.
• Subjects with a known hypersensitivity to tazarotene, halobetasol propionate, other corticosteroids, or to any ingredients in the study drugs.
• Subjects with current diagnosis of unstable forms of psoriasis including guttate, erythrodermic, exfoliative or pustular psoriasis.