Effects of boceprevir and telaprevir on the pharmacokinetics of dolutegravir

AIMS: The aim was to evaluate the effect of boceprevir and telaprevir on dolutegravir pharmacokinetics (PK); the effect of dolutegravir on boceprevir and telaprevir PK was assessed through comparison with historical data for each hepatitis C virus (HCV) drug's prescribing information alone. METHODS: This was a single-centre, randomized, open-label, two-cohort, two-period, one-way study in healthy adult subjects. Dolutegravir 50 mg once daily was administered for 5 days in Period 1, and dolutegravir 50 mg once daily was coadministered with either boceprevir 800 mg every 8 h (Cohort 1) or telaprevir 750 mg every 8 h (Cohort 2) for 10 days in Period 2. RESULTS: No deaths or serious adverse events were reported during the study. Four subjects were withdrawn from the study because of adverse events (elevated alanine aminotransferase, cellulitis, increased serum creatinine and dizziness). One subject became pregnant during the study. Coadministration of dolutegravir with boceprevir had no effect on dolutegravir area under the plasma concentration–time curve (AUC) and maximal plasma concentration (C(max)) and caused a small increase in concentration at the end of the dosing interval (C(τ); 8%). Coadministration of dolutegravir with telaprevir resulted in increased dolutegravir plasma exposures compared with those after administration of dolutegravir alone; AUC(0–)(τ), C(max) and C(τ) increased by 25, 19 and 37%, respectively. Coadministration of boceprevir or telaprevir with dolutegravir had no clinically significant effect on dolutegravir PK. Plasma boceprevir and telaprevir PK data for either combined treatment were similar to historical data, indicating no effect of dolutegravir on boceprevir or telaprevir exposure. CONCLUSIONS: Dolutegravir can be coadministered with boceprevir or telaprevir in patients coinfected with HIV and HCV with no dose adjustment.