Population PK/PD Modeling of Eltrombopag in Healthy Volunteers and Patients With Immune Thrombocytopenic Purpura and Optimization of Response-Guided Dosing

The relationship between plasma eltrombopag concentrations and increases in platelet counts (PLTC) was characterized in healthy volunteers (HVs) and patients with immune thrombocytopenic purpura (ITP) using population pharmacokinetic/pharmacodynamic (PK/PD) models. The semiphysiological model included 3 PK, 1 precursor production, 2 maturation, and 1 blood platelet compartments and assumed a linear increase in platelet production rate with...