Pharmacokinetics of the combination raltegravir/atazanavir in HIV-1-infected patients

A Jansen, radboud Colbers, A J A M van der Ven, C Richter, J K Rockstroh, J C Wasmuth, M van Luin, D M Burger

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

OBJECTIVES: To evaluate the use of raltegravir with unboosted atazanavir in combination with one nucleoside reverse transcriptase inhibitor (NRTI) (lamivudine or emtricitabine) as a potentially well-tolerated once-daily (qd) maintenance regimen.

METHODS: We compared the pharmacokinetics of raltegravir 400 mg twice daily (bid) with raltegravir 800 mg qd in HIV-infected patients (n=17) on unboosted atazanavir (600 mg qd) in combination with lamivudine or emtricitabine.

RESULTS: The area under the plasma concentration vs. time curve for a dose interval t (AUC0 -t ) of 800 mg qd divided by 2 was not significantly different from the AUC0 -t of 400 mg bid (P=0.664) but the minimum concentration (C min ) was 72% lower with the qd regimen (P=0.002). The regimen was well tolerated and the viral load remained undetectable in all patients during the 6 weeks of the study follow-up.

CONCLUSIONS: A qd regimen of raltegravir 800 mg, atazanavir 600 mg and lamivudine or emtricitabine resulted in favourable pharmacokinetic profiles and good short-term safety and efficacy data. Larger phase IIb studies are needed to explore this novel regimen.

Original languageEnglish
Pages (from-to)449-52
Number of pages4
JournalHIV Medicine
Volume14
Issue number7
DOIs
Publication statusPublished - Aug 2013
Externally publishedYes

Keywords

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Anti-HIV Agents/administration & dosage
  • Atazanavir Sulfate
  • Drug Administration Schedule
  • Drug Therapy, Combination
  • Female
  • HIV Infections/drug therapy
  • HIV-1/physiology
  • Humans
  • Male
  • Middle Aged
  • Oligopeptides/administration & dosage
  • Pyridines/administration & dosage
  • Pyrrolidinones/administration & dosage
  • Raltegravir Potassium
  • Reverse Transcriptase Inhibitors/pharmacokinetics
  • Viral Load
  • Young Adult

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