Drug Interactions Between Voriconazole and Atazanavir Coadministered as Atazanavir/Ritonavir in Healthy Participants

Treatment A: Participants with functional CYP2C19 alleles (EM) received oral tablets of voriconazole, 400 mg, twice daily (BID), on Day 1, then 200 mg BID on Days 2 and 3. Voriconazole dose was given at least 1 hour after a light meal. Treatment C: EM participants received atazanavir/ritonavir, 300/100 mg once daily (QD), plus voriconazole, 400 mg BID on Day 21 then 200 mg BID on Days 22-30. Atazanavir/ritonavir dose was administered in the morning within 5 minutes of completing a light meal, and 1 hour before voriconazole morning dose. Treatment E: PM participants received atazanavir/ritonavir, 300/100 mg QD plus voriconazole, 100 mg BID, on Day 21, then 50 mg BID on Days 22-30.

Treatment B in EM participants: EM participants received atazanavir/ritonavir, 300/100 mg once daily (QD), on Days 11 through 20. Treatment B in participants who were poor metabolizers of CYP2C19 (PMs): PM participants received oral tablets of atazanavir/ritonavir, 300/100 mg QD, on Days 11 through 20. Treatment C: EM participants received atazanavir/ritonavir, 300/100 mg QD, plus voriconazole, 400 mg BID on Day 21 then 200 mg BID on Days 22-30. Treatment E: PM participants received atazanavir/ritonavir, 300/100 mg QD plus voriconazole, 100 mg BID, on Day 21, then 50 mg BID on Days 22-30.

"Treatment B: EM participants received atazanavir/ritonavir, 300/100 mg once daily (QD), on Days 11 through 20. Atazanavir/ritonavir dose was administered in the morning within 5 minutes of completing a light meal.~Treatment C: EM participants received atazanavir/ritonavir, 300/100 mg QD, plus voriconazole, 400 mg BID on Day 21 then 200 mg BID on Days 22-30. Atazanavir/ritonavir dose was administered in the morning within 5 minutes of completing a light meal, and 1 hour before voriconazole morning dose.Treatment E: PM participants received atazanavir/ritonavir, 300/100 mg QD plus voriconazole, 100 mg BID, on Day 21, then 50 mg BID on Days 22-30. Treatment B in PM participants: PM participants received atazanavir/ritonavir, 300/100 mg QD, on Days 11 through 20. Atazanavir/ritonavir dose was administered in the morning within 5 minutes of completing a light meal."