Randomized Placebo-controlled Trial of Hydroxychloroquine in Outpatient Cases With Coronavirus Disease 2019 (COVID-19) (COALITION-V)
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ClinicalTrials.gov Identifier: NCT04466540 |
Recruitment Status :
Completed
First Posted : July 10, 2020
Last Update Posted : March 7, 2022
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Condition or disease | Intervention/treatment | Phase |
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COVID-19 | Drug: Hydroxychloroquine Drug: Placebo | Phase 4 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 1372 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Intervention Model Description: | Pragmatic, double-blind, placebo-controlled randomized parallel-group, two-arm clinical trial (with allocation ratio 1:1) |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Masking Description: | Randomization (1:1) is generated by a validated software and performed in permuted blocks of size 8. Concealment of the randomization list is maintained through a 24-hour, centralized, automated, internet-based randomization system. Furthermore, as placebo-controlled study, the placebo will have the same structural characteristics as the active drug and will be dispensed in cartridges that do not allow the identification of what is being given |
Primary Purpose: | Treatment |
Official Title: | Pragmatic, Double-blind, Placebo-controlled Randomized Clinical Trial, Evaluating Hydroxychloroquine for Prevention of Hospitalization and Respiratory Complications in Non-hospitalized Patients With Confirmed or Probable COVID-19 |
Actual Study Start Date : | May 12, 2020 |
Actual Primary Completion Date : | July 28, 2021 |
Actual Study Completion Date : | September 28, 2021 |

Arm | Intervention/treatment |
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Experimental: Hydroxychloroquine (HCQ)
HCQ group participants will receive a dose of 400mg twice daily (BID) in the first day, and a dose of 400 mg once daily (OD) from the second day of treatment, in a total of 7 days.
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Drug: Hydroxychloroquine
Hydroxychloroquine pharmaceutical form will be tablets of 400 mg. |
Placebo Comparator: Placebo
The placebo group will follow the same regimen of administration
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Drug: Placebo
Hydroxychloroquine placebo |
- Hospitalization [ Time Frame: 30 days from randomization ]To assess if the treatment is able to avoid hospitalization due to a COVID-19-related clinical reason within 30 days of randomization in an outpatient setting. Hospitalization is considered to be hospital stay for a period > 24h or an additional hospitalized calendar day.
- Uncontrolled asthma after ≥ 5 days of starting study medication [ Time Frame: within 30 days from randomization ]Affirmative answer in three or four items of the Global Initiative for Asthma (GINA) questionnaire
- Pneumonia [ Time Frame: within 30 days from randomization ]Defined by clinical-radiological criteria - a history of cough and one or more of the following symptoms: sputum, dyspnea, chest pain, sweating or fever (T> 37.8o C) + Chest CT scan showing ground-glass opacity, focal consolidations or mixed opacities (including reverse halo sign), uni or bilateral
- Otitis media [ Time Frame: within 30 days from randomization ]Defined by clinical criteria - Fever (T> 37.8o C) and otalgia + bulging of the tympanic membrane
- Fever resolution time [ Time Frame: within 30 days from randomization ]Day 0 of fever resolution will be defined as the first afebrile day (T <37.5o C) after inclusion in the study followed by at least two consecutive days. The temperature will be obtained through the participant report in the patient's diary
- Time to improve respiratory symptoms [ Time Frame: within 30 days from randomization ]Time to improve respiratory symptoms (cough, runny nose)
- Hospitalization in the Intensive Care Unit [ Time Frame: within 30 days from randomization ]Admission to ICU due to clinical reasons related to COVID-19
- Need for Orotracheal Intubation [ Time Frame: within 30 days from randomization ]Clinical need for Orotracheal Intubation as assessed by the physician responsible for the case
- Mechanical Ventilation Time [ Time Frame: within 30 days from randomization ]Number of days on mechanical ventilation until extubation or death
- Mortality [ Time Frame: within 30 days from randomization ]Death due to any cause that occurred within 30 days after inclusion in the study
- Hypoglycemia [ Time Frame: within 30 days from randomization ]Change in the frequency of hypoglycemic episodes in diabetic patients using hypoglycemic medication, perceived by clinical signs or symptoms or measured in a capillary or blood glucose device
- Palpitations [ Time Frame: within 30 days from randomization ]Presence of cardiac arrhythmias in patients without known history of prolongation of the measure between Q wave and T wave in the heart's electrical cycle (QTc) or pre-existing heart disease;
- Reduced visual acuity [ Time Frame: within 30 days from randomization ]Change in visual acuity or new diagnosis of retinal disease not previously documented
- Diarrhea [ Time Frame: within 30 days from randomization ]Change in bowel habit greater than three (3) diarrheal episodes per day during the use of hydroxychloroquine medication and 3 days after its end
- Anorexia [ Time Frame: within 30 days from randomization ]Change in appetite during medication use hydroxychloroquine and 3 days after the end of treatment
- Emotional lability [ Time Frame: within 30 days from randomization ]Perception of change in emotional lability (mood swings) during hydroxychloroquine use and 3 days after the end of treatment
- Time to hospitalization after randomization [ Time Frame: within 30 days from randomization ]Time from randomization to hospitalization
- Assessment of the patient clinical status at the time of hospitalization [ Time Frame: within 30 days from randomization ]Clinical and vital signs assessed when admitted to hospital

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
It will be considered eligible those adults (equal to or greater than 18 years) seeking medical care with suspected or confirmed COVID-19, with time between symptoms and inclusion ≤ 07 days, presenting mild symptoms, without indication of hospitalization and at least 1 risk factor for complication:
- > 65 years;
- Hypertension;
- Diabetes mellitus;
- Asthma;
- COPD or other chronic lung diseases;
- Smoking;
- Immunosuppression;
- Obesity (Defined as BMI equal to or greater than 30 Kg/m2).
Exclusion Criteria:
- Patients under 18 years old;
- Hospitalization at the first medical care;
- Positive test for influenza at the first medical care;
- Known hypersensitivity to hydroxychloroquine / chloroquine;
- Previous diagnosis of retinopathy or macular degeneration;
- Previous diagnosis of Long QT-syndrome, history of sudden death in close family members (parents and siblings), decompensated heart failure, unstable coronary artery disease, use of anti-arrhythmic drugs or other drugs that can increase the hydroxychloroquine bioavailability or enhance its effect;
- Evidence of known liver disease, reported by the patient;
- Evidence of known chronic kidney disease, reported by the patient;
- Patients with pancreatitis;
- Baseline ECG with QTc interval ≥ 480ms;
- Chronic use of hydroxychloroquine/chloroquine for other reasons;
- Pregnancy.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04466540

Principal Investigator: | Álvaro Avezum, Ph.D | International Research Center - Hospital Alemão Oswaldo Cruz |
Responsible Party: | Álvaro Avezum Junior, Research Manager - International Research Center, Hospital Alemão Oswaldo Cruz |
ClinicalTrials.gov Identifier: | NCT04466540 |
Other Study ID Numbers: |
30415320.8.1001.0070 |
First Posted: | July 10, 2020 Key Record Dates |
Last Update Posted: | March 7, 2022 |
Last Verified: | March 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
COVID-19 Severe Acute Respiratory Syndrome - Coronavirus-2 Hydroxychloroquine COALITION Brazil V 2019 Outpatients |
COVID-19 Pneumonia, Viral Pneumonia Respiratory Tract Infections Infections Virus Diseases Coronavirus Infections Coronaviridae Infections Nidovirales Infections RNA Virus Infections |
Lung Diseases Respiratory Tract Diseases Hydroxychloroquine Antimalarials Antiprotozoal Agents Antiparasitic Agents Anti-Infective Agents Enzyme Inhibitors Molecular Mechanisms of Pharmacological Action Antirheumatic Agents |