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Compare the Effectiveness Between Existing Treatment and New Treatment

NCT01640587 · Status: TERMINATED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 76

Last updated 2023-01-10

No results posted yet for this study

Summary

In camps for displaced persons located along the Thai-Myanmar border, mefloquine and artesunate combination therapy has been used since 1992. In vivo efficacy of a 3 day regimen of mefloquine + artesunate (MAS3) has been monitored regularly since its introduction in 1992. In 2009 Carrara et al summarised the in vivo PCR-adjusted cure rates at Day 42 and Day 63 in patients treated with MAS3 between 1995 and 2005, as well as the in-vitro parasite susceptibility to MAS3 during that same period, and the changes in pfmdr1 copy numbers.The proportion of patients with parasitaemia persisting on day-2 increased significantly from 4.5% before 2001 to 21.9% after 2002 (p\<0.001). Delayed parasite clearance was associated with increased risk of developing gametocytaemia (AOR = 2.29; 95% CI, 2.00-2.69, p = 0.002). MAS3 efficacy declined slightly but significantly (Hazards ratio 1.13; 95% CI, 1.07-1.19, p\<0.001), although efficacy in 2007 remained well within acceptable limits: 96.5% (95% CI, 91.0-98.7). The proportion of infections caused by parasites with increased pfmdr1 copy number rose from 30% (12/40) in 1996 to 53% (24/45) in 2006 (p = 0.012, test for trend).

Evidence of reduced susceptibility to artemisinins in Western Cambodia was first reported in January 2007. Artemisinin resistance was manifest by a marked slowing of parasite clearance. A more recent analysis of parasite clearance data collected prospectively in patients with uncomplicated hyperparasitaemic malaria has shown a progressive decline in parasite clearance rates over the last decade suggesting a decline following the same trajectory as in Western Cambodia but with a time lag of a few years.

Surveillance data collected in 2011 have shown a dramatic and worrying decline in efficacy of MAS3, albeit in a small number of patients. This decline in efficacy of mefloquine + artesunate is likely to be attributable to reduced parasite susceptibility to mefloquine. The other fixed dose combinations available dihydroartemisinin-piperaquine (DP) is the best option to replace mefloquine-artesunate since it is thought that it remains effective in the presence of high pfmdr1 copy numbers. In addition DP is administered once daily and needs no special dietary modification to ensure adequate absorption.

In this study it is hypothesised that efficacy of DP (estimated to be 95%) will be significantly higher than that of MAS3 (estimated to be 65%), therefore the investigators propose to conduct a randomised controlled trial between DP and MAS3 for the treatment of P.falciparum.

Conditions

  • P. Falciparum Malaria

Interventions

DRUG

Mefloquine+Artesunate

One tablet of artesunate contains 40mg (Guilin Pharmaceutical Company, PRC). One tablet of mefloquine contains 250 mg mefloquine (Eloquine® (Medochemie Ltd., Cyprus) Standard three days regimen of artesunate-mefloquine given as 4mg/kg artesunate/day and 8 mg/kg of mefloquine/day on Days 0, 1 and 2

DRUG

Dihydroartemisinin-Piperaquine

DHA-Piperaquine (Duo-Cotecxin® Beijing Holley-Cotec Pharmaceuticals Co., Ltd, China) One tablet contains 40mg of dihydroartemisinin and 320 mg piperaquine. A weight-based regimen containing 2.4 mg/kg DHA and 20 mg/kg PPQ once daily for 3 days

Sponsors & Collaborators

  • University of Oxford

    lead OTHER

Principal Investigators

  • Francois Nosten, MD · University of Oxford

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
5 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2013-11-30
Primary Completion
2017-03-31
Completion
2017-03-30

Countries

  • Thailand

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01640587 on ClinicalTrials.gov