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Evaluation of the effects of atazanavir-ritonavir on the pharmacokinetics of lumefantrine in patients living with HIV in Lagos University Teaching Hospital, South-Western Nigeria

  • Pharmacokinetics and Disposition
  • Published:
European Journal of Clinical Pharmacology Aims and scope Submit manuscript

Abstract

Purpose

Atazanavir-ritonavir (ATVr)-based antiretroviral therapy and artemether-lumefantrine (AL) are commonly used drugs for the treatment of human immune deficiency virus (HIV) infection and malaria respectively. However, interaction of both drugs, with Cytochrome P 3A4 (CYP 3A4) isoenzyme, may spawn clinically significant pharmacokinetic interactions. This study evaluated the effects of atazanavir-ritonavir on the pharmacokinetics of lumefantrine.

Method

In a case-control study, twenty participants having Plasmodium falciparum malaria were recruited and divided into two groups (ATVr-arm, n=10; and control-arm, n= 10). All the participants were administered six oral doses of AL 80-480 mg (Coartem). Thereafter, their blood samples were collected at different time intervals over seven days. The concentration of lumefantrine in each sample was quantified with high-performance liquid chromatography (HPLC) and used to determine its pharmacokinetic parameters which were compared between the test and control groups.

Results

ATVr increased the mean day 7 concentration of lumefantrine (ATVr 3847.09 ± 893.35 ng/mL, control 1374.53 ± 265.55 ng/mL, p = 0.016) and the area under its plasma concentration-time curve (ATVr 670529.57 ± 157172.93 ng.h/mL, control 447976.28 ± 80886.99 ng.h/mL, p = 0.224) by 179.88 % and 49.68 %, respectively, but decreased its mean maximum plasma drug concentration (Cmax) (ATVr 13725.70 ± 2658.44 ng/mL, control 15380.48 ± 2332.62 ng/mL, p = 0.645) by 10.76 %.

Conclusion

ATVr increased drug exposure and day 7 plasma concentration of lumefantrine. AL is therefore considered effective for the treatment of malaria in patients taking ATVr-based regimen. However, the safety associated with the interaction requires further elucidation.

Trial registration

Clin ClinicalTrials.gov Identifier: NCT04531072, August 27, 2020. “Retrospectively registered”

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Data Availability

Data and materials are available.

Code availability

Not applicable.

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Acknowledgments

This study was financed with a mentored-research grant (Award no: D43TW010134) from BRAINS (Building Research and Innovation in Nigeria Science), a research developmental project sponsored by the National Institute of Health (NIH).

Funding

Research reported in this publication was supported by the Fogarty International Center of the National Institutes of Health under Award Number D43TW010134. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.

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Authors and Affiliations

Authors

Contributions

Sikiru Olatunji Usman: designed study, performed research, analyzed data, and wrote the manuscript. Ibrahim Adekunle Oreagba: designed the study and reviewed the manuscript. Michael Rotimi Kadri: recruited participants, performed research, and collected and analyzed data. Ololade Oluwatosin Adewumi: recruited participants, performed research, collected, and analyzed data. Akinwumi Akinyede: reviewed manuscript and monitored participants medically. Esther Oluwatoyin Agbaje: designed study and reviewed manuscript. Ganiyu Abideen: participated in conception of the study, design of study, and review of manuscript. AbdulWasiu Adeniyi Busari: reviewed the manuscript and monitored participants medically. Olayinka Olaiwola Hassan: reviewed manuscript and monitored participants medically. Moshood Olusola Akinleye: performed research, analyzed data, and reviewed manuscript. Sulaimon Alani Akanmu: reviewed manuscript at conception and final stage.

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Correspondence to Sikiru Olatunji Usman.

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Ethics approval

Ethical approval was obtained from the Health Research Ethics Committee of the College of Medicine of the University of Lagos (CMUL/HREC/06/18/354: Sept 2018-Sept 2019).

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All authors gave their consent to participate in the study.

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All authors gave consent to publish the article in the European Journal of Clinical Pharmacology.

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The authors declare no conflict of interest.

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Usman, S.O., Oreagba, I.A., Kadri, M.R. et al. Evaluation of the effects of atazanavir-ritonavir on the pharmacokinetics of lumefantrine in patients living with HIV in Lagos University Teaching Hospital, South-Western Nigeria. Eur J Clin Pharmacol 77, 1341–1348 (2021). https://doi.org/10.1007/s00228-021-03116-x

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  • DOI: https://doi.org/10.1007/s00228-021-03116-x

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