Phase III trials success for tofacitinib in Plaque Psoriasis - Pfizer

Pfizer Inc. announced top-line results from two pivotal Phase III trials from the Oral treatment Psoriasis Trials (OPT) Program, OPT Pivotal #1 (A3921078) and OPT Pivotal #2 (A3921079), evaluating the efficacy and safety of tofacitinib, an oral Janus kinase (JAK) inhibitor, the first in a new class of medicines being investigated for the treatment of moderate-to-severe Plaque Psoriasis.

The OPT Pivotal #1 and OPT Pivotal #2 studies showed that tofacitinib, as a 5 mg or a 10 mg dose taken as a pill twice-daily, met the primary efficacy endpoints of statistically significant superiority over placebo at Week 16 in the proportion of subjects achieving a Physician�s Global Assessment response of �clear� or �almost clear,� and the proportion of subjects achieving at least a 75% reduction in Psoriasis Area and Severity Index, two commonly used measures of efficacy in psoriasis. No new safety signals for tofacitinib were observed in the OPT Pivotal #1 or OPT Pivotal #2 studies. Detailed analyses of these studies, including additional efficacy and safety data, will be submitted for presentation at a future scientific meeting.

Top-line results from the first two studies from the OPT Program, OPT Compare and OPT Retreatment, were previously announced in October 2013, and these four studies, in addition to a long-term extension study, will form the planned psoriasis submission package to regulatory authorities in various markets. Pfizer currently intends to submit a supplemental New Drug Application (sNDA) to the FDA for the approval of tofacitinib 5 mg and 10 mg twice-daily for the treatment of adults with moderate-to-severe chronic Plaque Psoriasis by early 2015.