The purpose of this study was to investigate the effects of QTI571 (imatinib) on pharmacokinetics of bosentan and sildenafil at steady state when co-administered to participants with pulmonary arterial hypertension.
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Geometric Mean Ratio of Dose Normalized Area Under the Curve From Time Zero to Tau (AUCtau) for Bosentan Before and After Imatinib Administrations
Timeframe: Day 1: pre-dose, Day 8: pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 10 and 12 hours post-dose, Day 9: pre-dose, Days 22 and 36: pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 10, 12 and 24 hours post-dose
Geometric Mean Ratio of Dose Normalized AUCtau for Sildenafil Before and After Imatinib Administrations
Timeframe: Day 1: pre-dose, Day 8: pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 10 and 12 hours post-dose, Day 9: pre-dose, Days 22 and 36: pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 10, 12 and 24 hours post-dose
Geometric Mean Ratio of Dose Normalized Maximum Plasma Concentration (Cmax) for Bosentan Before and After Imatinib Administrations
Timeframe: Day 1: pre-dose, Day 8: pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 10 and 12 hours post-dose, Day 9: pre-dose, Days 22 and 36: pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 10, 12 and 24 hours post-dose
Geometric Mean Ratio of Dose Normalized Cmax for Sildenafil Before and After Imatinib Administrations
Timeframe: Day 1: pre-dose, Day 8: pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 10 and 12 hours post-dose, Day 9: pre-dose, Days 22 and 36: pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 10, 12 and 24 hours post-dose