CYP2C19 Genotype-Dependent Pharmacokinetic Drug Interaction Between Voriconazole and Ritonavir-Boosted Atazanavir in Healthy Subjects

© 2016, The American College of Clinical Pharmacology..

Voriconazole, a broad-spectrum triazole antifungal agent, is metabolized by cytochrome P450 (CYP) 2C19 and, to a lesser extent, by CYP3A. Genetic polymorphism of CYP2C19 not only plays a prominent role in its disposition but may also influence potential drug interactions with CYP450 modulators such as ritonavir. This study assessed 2-way drug interactions of voriconazole added on to ritonavir-boosted atazanavir in both CYP2C19 extensive-metabolizer (EM) and poor-metabolizer (PM) healthy subjects. Each subject received voriconazole alone on days 1-3, followed by a 7-day washout. Atazanavir/ritonavir 300/100 mg once daily was given on days 11-30 and voriconazole on days 21-30. Voriconazole doses were 200 mg (400 mg on days 1 and 21) twice daily and 50 mg (100 mg on days 1 and 21) twice daily for CYP2C19 EM and PM subjects, respectively. On coadministration, voriconazole AUC and Cmin decreased by 33% (90%CI, 22%-42%) and 39% (90%CI, 28%-49%), respectively, in CYP2C19 EMs, whereas voriconazole Cmax and AUC increased 4.4-fold (90%CI, 3.6-fold to 5.4-fold) and 5.6-fold (90%CI, 4.5-fold to 7.0-fold), respectively, in PMs. Adding voriconazole resulted in a 20%-30% decrease in atazanavir Cmin in both EMs and PMs. Ritonavir exposure was generally unchanged in either population. The safety and tolerability profiles of the combination were comparable with atazanavir/ritonavir and voriconazole administered alone. The most frequent adverse events with voriconazole were visual disturbance and headache. Coadministration of voriconazole and atazanavir/ritonavir is not recommended unless the benefit/risk to the patient justifies the use of the combination.

Medienart:

E-Artikel

Erscheinungsjahr:

2017

Erschienen:

2017

Enthalten in:

Zur Gesamtaufnahme - volume:57

Enthalten in:

Journal of clinical pharmacology - 57(2017), 2 vom: 15. Feb., Seite 235-246

Sprache:

Englisch

Beteiligte Personen:

Zhu, Li [VerfasserIn]
Brüggemann, Roger J [VerfasserIn]
Uy, Jonathan [VerfasserIn]
Colbers, Angela [VerfasserIn]
Hruska, Matthew W [VerfasserIn]
Chung, Ellen [VerfasserIn]
Sims, Karen [VerfasserIn]
Vakkalagadda, Blisse [VerfasserIn]
Xu, Xiaohui [VerfasserIn]
van Schaik, Ron H N [VerfasserIn]
Burger, David M [VerfasserIn]
Bertz, Richard J [VerfasserIn]

Links:

Volltext

Themen:

4MT4VIE29P
Antifungal Agents
Atazanavir Sulfate
CYP2C19 protein, human
Clinical pharmacology (CPH)
Cytochrome P-450 CYP2C19
Drug Combinations
Drug-drug interactions
EC 1.14.14.1
HIV/AIDS
HIV Protease Inhibitors
JFU09I87TR
Journal Article
O3J8G9O825
Pharmacogenetics/pharmacogenomics
Pharmacokinetics and drug metabolism
Research Support, Non-U.S. Gov't
Ritonavir
Voriconazole

Anmerkungen:

Date Completed 16.08.2017

Date Revised 27.11.2017

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1002/jcph.798

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM262566818