A Study To Compare The Amount Of Tasocitinib (CP-690,550) That Is Absorbed Into The Blood Of Healthy Subjects Following Oral Administration Of Three Different Tablet Versions Of Tasocitinib (CP-690,550)

Phase 1, Open-Label, Randomized, Single-Dose, 3-Treatment, 3-Period, Cross-Over, Bioequivalence Study Comparing Phase 2b, Phase 3 And Commercial Image Tablet Formulations Of Tasocitinib (CP-690,550) Under Fasted Conditions

In this study, a 10 mg dose of tasocitinib (CP-690,550) will be given to study subjects on three separate occasions using one of three different tablet formulations (tablet versions) each time. The amount of tasocitinib (CP-690,550) available in the blood following administration of each tablet formulation will be measured and compared. The overall aim of the study is to establish that a similar amount of tasocitinib (CP-690,550) is absorbed into the blood following administration of the same dose of each different tablet formulation.

This is a pivotal bioequivalence study for tasocitinib (CP-690,550).

Inclusion Criteria:

• Healthy male and/or female (non-childbearing potential) subjects between the ages of 21 and 55 years, inclusive.
• Body Mass Index (BMI) of 17.5 to 30.5 kg/m2; and a total body weight for males>50 kg (110 lbs). For females, total body weight >45 kg (99 lbs).
• No evidence of active or latent or inadequately treated infection with Mycobacterium tuberculosis (TB).

Exclusion Criteria:

• Evidence of any clinically significant illness, medical condition, or disease.
• Evidence or history of any clinically significant infections within the past 3 months.
• Use of tobacco- or nicotine-containing products in excess of the equivalent of 5 cigarettes per day.