Evidence map›Paper›PMID 33407454›Full record

ArticleMalaria journal2021

Pharmacokinetic profile of amodiaquine and its active metabolite desethylamodiaquine in Ghanaian patients with uncomplicated falciparum malaria.

Thomas A Anyorigiya, Sandra Castel, Katya Mauff, Frank Atuguba, Bernhards Ogutu, Abraham Oduro, David Dosoo, Kwaku-Poku Asante, Seth Owusu-Agyei, Alexander Dodoo and 7 more

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in Malaria journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
2.4field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 20 citations in OpenAlex.

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  8. Advancing liposome technology for innovative strategies against malaria.Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society · 2024
    Review
  9. Real-time measurements of ATP dynamics via ATeams inAntimicrobial agents and chemotherapy · 2024
    Article
  10. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

17 authors at 7 institutions in 3 countries.

Thomas A AnyorigiyaDivision of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa.
Sandra CastelDivision of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa.
Katya MauffDepartment of Statistical Sciences, University of Cape Town, Cape Town, South Africa.
Frank AtugubaNavrongo Health Research Centre, Navrongo, Ghana.
Bernhards OgutuCentre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya.
Abraham OduroNavrongo Health Research Centre, Navrongo, Ghana.
David DosooKintampo Health Research Centre, Kintampo, Ghana.
Kwaku-Poku AsanteKintampo Health Research Centre, Kintampo, Ghana.
Seth Owusu-AgyeiUniversity for Health and Allied Sciences, Ho, Volta Region, Ghana.
Alexander DodooGhana Standards Authority, Accra, Ghana.
Abraham HodgsonNavrongo Health Research Centre, Navrongo, Ghana.
Fred BinkaUniversity for Health and Allied Sciences, Ho, Volta Region, Ghana.
Lesley J WorkmanDivision of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa.
Elizabeth N AllenDivision of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa.
Paolo DentiDivision of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa.
Lubbe WiesnerDivision of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa.
Karen I BarnesDivision of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa. karen.barnes@uct.ac.za.ORCID http://orcid.org/0000-0002-0107-3063
University of Cape Town · ZAKintampo Health Research Centre · GHNavrongo Health Research Centre · GHUniversity of Health and Allied Sciences · GHDodowa Health Research Centre · GHGhana Education Service · GHKenya Medical Research Institute · KE

Funding

Bill and Melinda Gates Foundation 48363.01
6 · The paper itself

Abstract

backgroundAccurate measurement of anti-malarial drug concentrations in therapeutic efficacy studies is essential to distinguish between inadequate drug exposure and anti-malarial drug resistance, and to inform optimal anti-malarial dosing in key target population groups.

methodsA sensitive and selective LC-MS/MS method was developed and validated for the simultaneous determination of amodiaquine and its active metabolite, desethylamodiaquine, and used to describe their pharmacokinetic parameters in Ghanaian patients with uncomplicated falciparum malaria treated with the fixed-dose combination, artesunate-amodiaquine.

resultsThe day-28 genotype-adjusted adequate clinical and parasitological response rate in 308 patients studied was > 97% by both intention-to-treat and per-protocol analysis. After excluding 64 patients with quantifiable amodiaquine concentrations pre-treatment and 17 with too few quantifiable concentrations, the pharmacokinetic analysis included 227 patients (9 infants, 127 aged 1-4 years, 91 aged ≥ 5 years). Increased median day-3 amodiaquine concentrations were associated with a lower risk of treatment failure [HR 0.87 (95% CI 0.78-0.98), p = 0.021]. Amodiaquine exposure (median AUC

conclusionsEfficacy of artesunate-amodiaquine at currently recommended dosage regimens was high across all age groups. Reassuringly, amodiaquine and desethylamodiaquine exposure was not reduced in underweight-for-age young children or those with high parasitaemia, two of the most vulnerable target populations. A larger pharmacokinetic study with close monitoring of safety, including full blood counts and liver function tests, is needed to confirm the higher amodiaquine exposure in infants, understand any safety implications and assess whether dose optimization in this vulnerable, understudied population is needed.

Indexed as

AdolescentAdultAgedAged, 80 and overAmodiaquineAntimalarialsArtemisininsChildChild, PreschoolChromatography, LiquidDrug CombinationsFemaleGhanaHumansInfantMalaria, FalciparumAmodiaquineamodiaquine, artesunate drug combinationAntimalarialsArtemisininsdesethylamodiaquineDrug CombinationsAmodiaquineArtesunateFixed-dose combinationGhanaInfantsParasite densityP. falciparum malariaPharmacokineticsUnderweight-for-ageYoung children

Identifiers

PMID33407454
PMCPMC7788723
OpenAlexW4206076601

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.