A phase 1, open-label, 4-part, 2-period, fixed-sequence study to assess the effect of Itraconazole, a strong CYP3A inhibitor, the effect of Fluconazole, a moderate CYP3A/2C9 inhibitor, the effect of Rifampin, a strong CYP3A inducer, and the effect of Rabeprazole, a proton pump inhibitor on the pharmacokinetics (PK) of a single oral dose of HMPL-689 in study participants. The secondary objective is to evaluate the safety of a single oral dose of HMPL-689 administered with and without Itraconazole, Fluconazole, Rifampin, or Rabeprazole in study participants.
An open-label study to determine effect of Itraconazole, Fluconazole, Rifampin, and Rabeprazole on the PK of HMPL-689