Condition category
Infections and Infestations
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
Malaria is a serious tropical disease spread by mosquitoes that kills more than a million people each year, the majority in sub-Saharan Africa. Sickle cell anaemia is an inborn defect of the blood that occurs commonly in parts of the world such as sub-Saharan Africa where malaria is also very common. Sickle cell anaemia is associated with complications such as bone pain and anaemia (shortage of red blood cells). Malaria is an important trigger of these complications. Intermittent preventive treatment (IPT) involves administering antimalarial drugs at predetermined intervals. IPT using the drugs sulfadoxine-pyrimethamine has been found to reduce death and sickness due to malaria in infants, children and pregnant women. Proguanil is among the drugs presently being used for malaria prevention in patient with sickle cell anaemia. The aim of this study is to compare the tolerability and acceptability of supervised bimonthly treatment with either sulfadoxine-pyrimethamine plus amodiaquine (SP+AQ) or mefloquine plus artesunate (MQ+AS), with daily proguanil.

Who can participate?
Children aged 6 months or older with sickle cell anaemia.

What does the study involve?
Participants are randomly allocated into three groups, to receive either bimonthly treatment with SP+AQ, bimonthly treatment with MQ+AS, or daily proguanil. They take this for 12 months. The clinical and laboratory features of malaria are assessed and compared between the three groups.

What are the possible benefits and risks of participating?
Not provided at time of registration.

Where is the study run from?
University of Ilorin Teaching Hospital (Nigeria).

When is the study starting and how long is it expected to run for?
September 2011 to November 2012.

Who is funding the study?
Wellcome Trust (UK).

Who is the main contact?
Dr Rasaq Olaosebikan

Trial website

Contact information



Primary contact

Dr Rasaq Olaosebikan


Contact details

Department of Paediatrics & Child Health
University of Ilorin Teaching Hospital
Oke Oyi
+234 (0)806 277 1228

Additional identifiers

EudraCT number number


Protocol/serial number


Study information

Scientific title

A randomised trial to compare the safety, tolerability and efficacy of bi-monthly intermittent preventive treatment with either artesunate plus mefloquine or amodiaquine plus sulfadoxine-pyrimethamine with the standard regimen of daily proguanil for the prevention of malaria and related complications in patients with sickle cell anaemia in Nigeria



Study hypothesis

Supervised bimonthly courses of treatment with mefloquine-artesunate (MQ+AS), or SP plus amodiaquine (SP+AQ), will be more effective in prevention of malaria and related complications in children with SCA compared to daily doses of proguanil and will be acceptable when taken on a long term basis.

Ethics approval

1. London School of Hygiene & Tropical Medicine Ethics Committee, 05/05/2011, ref: application No 5942
2. University of Ilorin Teaching Hospital Ethical Review Committee, 06/07/2011

Study design

Open-label randomised trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Sickle cell anaemia and malaria prevention


Group 1
Daily proguanil: Active Comparator
Standard policy of a supply of proguanil tablets to be taken daily
Intervention: Drug: Proguanil
Assigned intervention Proguanil tablets, 1.5mg/kg/day

Group 2
IPT with MQ+AS bimonthly: Experimental
Intermittent Preventive Treatment (IPT) consisting of a bimonthly course of treatment with mefloquine-artesunate (MQ+AS)
Intervention: Drug: mefloquine plus artesunate
Assigned intervention
Drug: mefloquine plus artesunate
This treatment is given once a day for 3 days. Patients weighing 5-8 kg receive one paediatric tablet per day, those weighing 9-17 kg two paediatric tablets, those weighing 18-29 kg one adult tablet and those weighing 30 kg and two adult tablets

Group 3
IPT with SP+AQ bimonthly: Experimental
IPT with bimonthly course of treatment with sulfadoxine-pyrimethamine plus amodiaquine (SP+AQ)

Assigned Intervention: Drug: Sulfadoxine-pyrimethamine plus amodiaquine supervised at each bimonthly clinic visit (amodiaquine 10mg/kg per day for three days and sulfadoxine-pyrimethamine (25/1.25 mg/kg) on the first day).

Intervention type



Not Applicable

Drug names

Proguanil, mefloquine, artesunate, sulfadoxine, pyrimethamine, amodiaquine

Primary outcome measure

1. Incidence of adverse events [ Time Frame: 12 months ]
2. Adherence to the recommended regimen [ Time Frame: 12 months ]
3. The co-primary endpoints of the trial will be :
3.1.The occurrence of any solicited adverse event
3.2. The occurrence of vomiting
3.3. The most commonly reported adverse event after IPT treatments and
3.4. Adherence to the regimen ie the number of doses or complete courses of medication received by children in each group as a proportion of the number of doses/complete courses that should have been received

Secondary outcome measures

1. Mean haemoglobin concentration 12 months after enrolment
2. Occurrence of other common adverse events such as diarrhoea, skin rash, itching or nausea
3. Number of hospital admissions during the surveillance period
4. Number of blood transfusions received
5. Number of cases of severe malaria during the surveillance period
6. Number of out patient department (OPD) attendances with clinical malaria that meet the case definitions during the surveillance period (malaria episodes over time)
7. Number of patients experiencing bone pain, haemolytic, and aplastic crises

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Age 6months or older and >=5kg
2. Sickle cell clinic attendant
3. Both males and females
4. Agree to abide by the study protocol
5. Give informed consent and assent
6. Not acutely sick at the time of recruitment
7. Not having additional chronic disease
8. Haemoglobin (Hb) genotype of SS and SC confirmed by electrophoresis

Participant type


Age group




Target number of participants

Estimated enrollment: 270 participants

Participant exclusion criteria

1. Known allergy to any of the antimalarial drugs use in the trial
2. Severe illnesses requiring urgent admission
3. Treatment with sulfadoxine-pyrimethamine or mefloquine in the previous 2 weeks
4. Patients on cotrimoxazole prophylaxis

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

University of Ilorin Teaching Hospital

Sponsor information


Wellcome Trust (UK)

Sponsor details

215 Euston Road
United Kingdom
+44(0)20 7811 8545

Sponsor type




Funder type


Funder name

Wellcome Trust (UK) (WT086153MA)

Alternative name(s)


Funding Body Type

private sector organisation

Funding Body Subtype



United Kingdom

Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes