PMID- 27128212 OWN - NLM STAT- MEDLINE DCOM- 20180116 LR - 20220311 IS - 2160-7648 (Electronic) IS - 2160-763X (Linking) VI - 4 IP - 2 DP - 2015 Mar TI - Safety, tolerability, and pharmacokinetics of single oral doses of tofacitinib, a Janus kinase inhibitor, in healthy volunteers. PG - 83-8 LID - 10.1002/cpdd.171 [doi] AB - Tofacitinib is an oral Janus kinase inhibitor. This randomized, double-blind, parallel-group, placebo-controlled study was the first evaluation of tofacitinib in humans. The objectives were to characterize the safety and tolerability, pharmacokinetics (PK), and pharmacodynamics of escalating single tofacitinib doses in healthy subjects. Tofacitinib (0.1, 0.3, 1, 3, 10, 30, 60, and 100 mg) or placebo was administered as oral powder for constitution. For each dose, 7-9 subjects were randomized to tofacitinib and 3-5 subjects to placebo. Ninety-five males and females (age range 19-45) completed the study. Forty-nine treatment-emergent all-causality adverse events (AEs) were observed; nausea and headache were the most frequently reported. Tofacitinib PK was characterized by rapid absorption (time to peak serum concentration [Tmax ] 0.5-1 hour), rapid elimination (mean terminal half-lives 2.3-3.1 hours), and dose-proportional systemic exposures (peak serum concentration [Cmax ] and area under the serum concentration-time curve from time zero to infinity [AUC0-infinity ]). No appreciable correlation was observed between tofacitinib dose and lymphocyte subset counts. Single-dose tofacitinib up to 100 mg in healthy subjects had a safety profile of mostly mild AEs, and no deaths, serious AEs, severe AEs or discontinuations due to AEs. CI - (c) 2014, The American College of Clinical Pharmacology. FAU - Krishnaswami, Sriram AU - Krishnaswami S AD - Pfizer Inc, Groton, CT, USA. FAU - Boy, Mary AU - Boy M AD - Pfizer Inc, Groton, CT, USA. FAU - Chow, Vincent AU - Chow V AD - Pfizer Inc, Groton, CT, USA. FAU - Chan, Gary AU - Chan G AD - Pfizer Inc, Groton, CT, USA. LA - eng PT - Journal Article PT - Multicenter Study PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't DEP - 20141205 PL - United States TA - Clin Pharmacol Drug Dev JT - Clinical pharmacology in drug development JID - 101572899 RN - 0 (Janus Kinase Inhibitors) RN - 0 (Piperidines) RN - 0 (Pyrimidines) RN - 0 (Pyrroles) RN - 87LA6FU830 (tofacitinib) SB - IM MH - Administration, Oral MH - Adult MH - Area Under Curve MH - Double-Blind Method MH - Drug Administration Schedule MH - Female MH - Half-Life MH - Healthy Volunteers MH - Humans MH - Janus Kinase Inhibitors/*administration & dosage/adverse effects/blood/*pharmacokinetics MH - Male MH - Metabolic Clearance Rate MH - Middle Aged MH - Models, Biological MH - New Jersey MH - Piperidines/*administration & dosage/adverse effects/blood/*pharmacokinetics MH - Pyrimidines/*administration & dosage/adverse effects/blood/*pharmacokinetics MH - Pyrroles/*administration & dosage/adverse effects/blood/*pharmacokinetics MH - Texas MH - Young Adult OTO - NOTNLM OT - Janus kinase inhibitor OT - pharmacokinetics OT - single dose tolerance OT - tofacitinib EDAT- 2016/04/30 06:00 MHDA- 2016/04/30 06:01 CRDT- 2016/04/30 06:00 PHST- 2014/07/26 00:00 [received] PHST- 2014/10/06 00:00 [accepted] PHST- 2016/04/30 06:00 [entrez] PHST- 2016/04/30 06:00 [pubmed] PHST- 2016/04/30 06:01 [medline] AID - 10.1002/cpdd.171 [doi] PST - ppublish SO - Clin Pharmacol Drug Dev. 2015 Mar;4(2):83-8. doi: 10.1002/cpdd.171. Epub 2014 Dec 5.