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Related Experiment Videos

The relationship between nevirapine plasma concentrations and abnormal liver function tests.

Lisa M Almond1, Marta Boffito, Patrick G Hoggard

  • 1Department of Pharmacology and Therapeutics, University of Liverpool, Liverpool, UK. lisaa@liv.ac.uk

AIDS Research and Human Retroviruses
|August 17, 2004
PubMed
Summary

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This study found no strong link between nevirapine (NVP) levels and liver damage in HIV patients. However, higher unbound NVP concentrations were seen in those with elevated liver enzymes or hepatitis B/C coinfection.

Area of Science:

  • Pharmacology
  • Hepatology
  • Infectious Diseases

Background:

  • Abnormal liver function tests are common in HIV patients on nevirapine (NVP).
  • Understanding the relationship between NVP plasma concentrations and liver enzyme elevation is crucial for patient management.

Purpose of the Study:

  • To investigate the association between total and unbound plasma nevirapine concentrations and liver enzymes alanine aminotransferase (ALT) and gamma-glutamyl transferase (gammaGT) in HIV-infected individuals.
  • To explore the impact of hepatitis B or C virus (HBV/HCV) coinfection on NVP concentrations and liver function.

Main Methods:

  • Prospective study of 85 HIV-infected individuals receiving NVP and nucleoside reverse transcriptase inhibitors (NRTIs).
  • Measurement of total and unbound NVP trough concentrations (C(trough)) using HPLC-MS/MS.

Related Experiment Videos

  • Assessment of liver function tests (ALT and gammaGT) and correlation with NVP levels and HBV/HCV coinfection status.

    • Main Results:

    • A linear relationship was found between total and unbound NVP C(trough).
    • Elevated ALT levels correlated with higher unbound NVP C(trough) (p=0.04), but not total NVP.
    • Increased gammaGT levels were associated with significantly higher total and unbound NVP C(trough) (p<0.001 and p=0.03, respectively).
    • Higher unbound NVP C(trough) was observed in patients coinfected with HCV/HBV (p=0.02).

    Conclusions:

    • No strong overall association was found between nevirapine concentrations and hepatotoxicity.
    • While NVP was well-tolerated in coinfected patients, higher plasma concentrations were noted.
    • Further research may be needed to fully elucidate NVP pharmacokinetics in specific patient populations.