Conditions: Healthy Volunteer
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 20
Healthy volunteers: yes

Brief summary:
This is a Phase 1, single-center, open-label, randomized, 3-period, 2-sequence crossover study of cobimetinib in healthy participants to evaluate the effect of the proton-pump inhibitor (PPI) rabeprazole on the relative bioavailability of cobimetinib in healthy participants when administered in the fed or fasted states.

Detailed description:

Arms:
arm 1: Treatment A in Period 1: One 20-mg tablet of cobimetinib will be administered orally with 240 milliliters (mL) room temperature water after at least an 8-hour fast. Treatment B in Period 2: 20 mg oral rabeprazole will be administered once daily for 4 days starting on Day -4. On Day 1, 20 mg rabeprazole will be administered in fasted state followed by one 20-mg tablet of cobimetinib administration orally with 240 mL room temperature water after at least an 8-hour fast. Treatment C in Period 3: 20 mg oral rabeprazole will be administered once daily for 4 days starting on Day -4. On Day 1, 20 mg rabeprazole will be administered in fasted state. Approximately 30 minutes later, participants will be provided a standardized Food and Drug Administration (FDA) high-fat meal, and approximately 30 minutes after starting meal, one 20-mg tablet of cobimetinib will be administered orally with 240 mL room temperature water. There will be a 13-day washout between cobimetinib doses of each period. arm 2: Treatment A in Period 1: One 20-mg tablet of cobimetinib will be administered orally with 240 mL room temperature water after at least an 8-hour fast. Treatment C in Period 2: 20 mg oral rabeprazole will be administered once daily for 4 days starting on Day -4. On Day 1 of the treatment period, 20 mg rabeprazole will be administered in fasted state. Approximately 30 minutes later, participants will be provided a standardized FDA high-fat meal, and approximately 30 minutes after starting meal, one 20-mg tablet of cobimetinib will be administered orally with 240 mL room temperature water. Treatment B in Period 3: 20 mg oral rabeprazole will be administered once daily for 4 days starting on Day -4. On Day 1 of treatment period, 20 mg rabeprazole will be administered in fasted state followed by one 20-mg tablet of cobimetinib administration orally with 240 mL room temperature water after at least an 8-hour fast. There will be a 13-day washout between cobimetinib doses of each period.

Interventions: intervention 1: Cobimetinib intervention 2: Rabeprazole
Intervention descriptions: intervention 1: One 20-mg tablet of cobimetinib will be administered orally with 240 mL room temperature water after at least an 8-hour fast or approximately 30 minutes after starting the standardized FDA high-fat meal. intervention 2: Rabeprazole 20 mg will be administered orally once daily for 4 days starting on Day -4 and on Day 1 of the treatment period.

Protocol document: