Pharmacokinetics Of CP-690,550 In Pediatric Patients With Juvenile Idiopathic Arthritis (JIA)

CP-690,550 will be administered orally twice daily according to the dosing regimen provided below. Oral solution will be used for children weighing \<40 kg. Oral tablets will be used for children weighing ≥40 kg. Children aged 12 to less than 18 years who are unable to swallow tablets will have the option of taking oral solution. Body Weight (kg) Dose (mg) Volume (mL) 5-11 1 1; 12-18 1.5 1.5; 19-24 2 2; 25-31 2.5 2.5; 32-39 3 3; ≥40 5 5

CP-690,550 will be administered orally twice daily according to the dosing regimen provided below. Oral solution will be used for children weighing \<40 kg. Oral tablets will be used for children weighing ≥40 kg. Children less than 12 years of age with a body weight of ≥40 kg will have the option of taking oral solution or tablets. Body Weight (kg) Dose (mg) Volume (mL) 5-11 1 1; 12-18 1.5 1.5; 19-24 2 2; 25-31 2.5 2.5; 32-39 3 3; ≥40 5 5

CP-690,550 will be administered orally twice daily according to the dosing regimen provided below. Children with a body weight ≥30 kg will have the option of taking oral solution or tablets, and children weighing \<30 kg will be dosed with the oral solution. Body Weight (kg) Dose (mg) Volume (mL) 5-6 1 1; 7-9 1.5 1.5; 10-12 2 2; 21-15 2.5 2.5; 16-19 3 3; 20-22 3.5 3.5; 23-26 4 4; 27-29 4.5 4.5; ≥30 5 5