Drug Interaction Study Evaluating the Effect of Rifampin on PK and Safety of PF 04965842.

single oral 200 mg dose of PF 04965842 in the morning on Day 1 under fasted conditions.In Period 2, subjects will receive rifampin 600 mg QD in the mornings of Day 1 to Day 7, approximately 1 hour before the morning meal. On the morning of Day 8, after an overnight fast of approximately 9 hours, subjects will be administered rifampin 600 mg 1 hour prior to administration of a single 200 mg oral dose of PF 04965842.

In Period 2, subjects will receive rifampin 600 mg QD in the mornings of Day 1 to Day 7, approximately 1 hour before the morning meal. On the morning of Day 8, after an overnight fast of approximately 9 hours, subjects will be administered rifampin 600 mg 1 hour prior to administration of a single 200 mg oral dose of PF 04965842