Malaria, FalciparumPhase 2NCT00082563
Azithromycin in Combination With Chloroquine Versus Chloroquine in the Eradication of Asymptomatic Plasmodium Falciparum
A Phase 2 study testing Azithromycin/Chloroquine and Chloroquine in people with Malaria, Falciparum, run by Pfizer.
Trial summary
The purpose of this study is to determine if Azithromycin in combination with chloroquine is superior to chloroquine alone in eradicating P. falciparum asexual parasitemia in asymptomatic, semi-immune adults in Western Kenya. Read more about this study
- Who is it for?
- Ages 18 to 60 yearsHealthy volunteers can take part
- Conditions the study is for
- Malaria, Falciparum
- What is being tested?
- Azithromycin/Chloroquine and Chloroquine
- How many people
- 14 participants
- Where
- No sites listed yet
- Study dates
- Aug 2004to Nov 2004
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 60 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Healthy adult: male or female
- Asymptomatic mono-infection with P. falciparum parasitemia with a parasite density of 1000 - 30,000 parasites/μL
- Age 18 years to 60 years
- Willingness to sign and ability to understand consent form
- Willingness and ability to return for scheduled follow up visits
Who cannot join
- Mixed malaria infection by Giemsa smear
- History of allergy to or hypersensitivity to chloroquine, Azithromycin or other macrolides (e.g. erythromycin, clarithromycin)
- Any of the following: a.) Antimalarial therapy administered in the past 4 weeks, including quinine therapy or an artemisinin derivative; or b.) An antibacterial with known antimalarial activity (including, erythromycin, doxycycline, clindamycin, cotrimoxazole) within one week prior to enrollment into the study
- Fever, history of fever in past 48 hours, or signs/symptoms of malaria (including acute or subacute headache, nausea, or vomiting)
- Inability to swallow oral medication
- Laboratory evidence or history of significant cardiovascular, liver, hematologic or renal functional abnormality
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- Any situation which could prevent the patient from returning to follow up visits
- Pregnancy or breast feeding
- Any other concurrent illness that may confound the result
- Any other condition or circumstance that in the opinion of the Investigator may pose a threat to the study participant or study
About this study
Official title: A Phase II, Randomized, Comparative Trial Of Azithromycin In Combination With Chloroquine Versus Chloroquine In The Eradication Of Asymptomatic Plasmodium Falciparum Infection In Semi-Immune Adults
The purpose of this study is to determine if Azithromycin in combination with chloroquine is superior to chloroquine alone in eradicating P. falciparum asexual parasitemia in asymptomatic, semi-immune adults in Western Kenya.
Read the detailed description
The trial was terminated prematurely 9 November 2004 due to the inability to recruit the planned number of subjects. There were no safety or efficacy concerns regarding the study in the decision to terminate the trial.
- Conditions
- Malaria, Falciparum
- Being tested
- Azithromycin/Chloroquine, Chloroquine
- Medical subject headings
- Malaria, Falciparum
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Azithromycin/ChloroquineDrug
ChloroquineDrug
What is being measured
The primary outcome is the main question the study is designed to answer.
Parasite clearance
Secondary outcomes (1)
tolerability
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 May 2004 (estimated)
- Study startAug 2004
- Study completionNov 2004
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Malaria, FalciparumStudies of the same condition, open and under way.
- More trials run by PfizerThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Enrolment
- 14 participants (actual)
Sponsor and investigators
- Lead sponsor
- Pfizer
- Sponsor type
- Industry (pharma, biotech, devices)
- Investigators
- Pfizer CT.gov Call Center, Study director, Pfizer
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00082563
- Sponsor's protocol ID
- A0661121
- Status last verified
- Apr 2011
- First submitted
- 12 May 2004
- Last updated
- 26 Apr 2011
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 26 Apr 2011. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase II, Randomized, Comparative Trial Of Azithromycin In Combination With Chloroquine Versus Chloroquine In The Eradication Of Asymptomatic Plasmodium Falciparum Infection In Semi-Immune Adults
- ClinicalTrials.gov ID
- NCT00082563
- Acronym / sponsor ID
- A0661121
- Conditions
- Malaria, Falciparum
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Terminated
- Enrolment
- 14 participants (actual)
- Lead sponsor
- PfizerIndustry (pharma, biotech, devices)
- Study start
- Aug 2004
- Study completion
- Nov 2004 (actual)
- First posted
- 14 May 2004 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to determine if Azithromycin in combination with chloroquine is superior to chloroquine alone in eradicating P. falciparum asexual parasitemia in asymptomatic, semi-immune adults in Western Kenya.
Detailed description
The trial was terminated prematurely 9 November 2004 due to the inability to recruit the planned number of subjects. There were no safety or efficacy concerns regarding the study in the decision to terminate the trial.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
Who may qualify
- Ages
- 18 to 60 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (5 listed)
- Healthy adult: male or female
- Asymptomatic mono-infection with P. falciparum parasitemia with a parasite density of 1000 - 30,000 parasites/μL
- Age 18 years to 60 years
- Willingness to sign and ability to understand consent form
- Willingness and ability to return for scheduled follow up visits
Key exclusion criteria (10 listed)
- Mixed malaria infection by Giemsa smear
- History of allergy to or hypersensitivity to chloroquine, Azithromycin or other macrolides (e.g. erythromycin, clarithromycin)
- Any of the following: a.) Antimalarial therapy administered in the past 4 weeks, including quinine therapy or an artemisinin derivative; or b.) An antibacterial with known antimalarial activity (including, erythromycin, doxycycline, clindamycin, cotrimoxazole) within one week prior to enrollment into the study
- Fever, history of fever in past 48 hours, or signs/symptoms of malaria (including acute or subacute headache, nausea, or vomiting)
- Inability to swallow oral medication
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Azithromycin/Chloroquine | Drug | – |
| Chloroquine | Drug | – |
Primary outcome
Parasite clearance
1 secondary outcome
tolerability
Results and safety
The study was stopped early. Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 Apr 2011.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Pfizer CT.gov Call Center study director
Pfizer
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Azithromycin/Chloroquine and Chloroquine in people with Malaria, Falciparum, run by Pfizer.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: stopped early, as of the sponsor's last update on 26 Apr 2011. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study was stopped early. Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Parasite clearance. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 Apr 2011; AzTrials last refreshed its copy on 7 Nov 2026.