Efficacy of Chloroquine or Hydroxychloroquine in Treating Pneumonia Caused by SARS-Cov-2 - COVID-19
Multicentric Pragmatic Randomized Controled Trial to Evaluate the Efficacy Chloroquine or Hydroxychloroquine for Five Days in Treating Pneumonia Caused by SARS-Cov-2 - COVID-19
  • Phase

    Phase 3
  • Study Type

  • Status

    Completed No Results Posted
  • Study Participants

Facing the challenge of finding an efficient treatment for COVID-19, the viral pneumonia caused by the Coronavirus SARS-Cov-2, this study intended to test if Chloroquine or Hydroxychloroquine, two drugs with strong in-vitro antiviral role proven by numerous studies and with a well defined safety profile established, for efficacy in treating COVID-19 and improving an ordinal primary outcome composed by a 9-levels scale, which was recomended by the World Health Organization.
This is a Phase 3, Pragmatic, Multicentric Randomized Controled Trial of efficacy to test the effect of either Chloroquine or Hydroxychloroquine for 5 days in the recomended dose standardized by brazilian Ministry of Health.

Patients were randomized (1:1) using stratified randomization by hospital and severity at the moment of randomization (stipulated by use of mechanical ventilation or not) into two arms: Intervention and Control. Intervention group recieved a loading dose of 900mg of Chloroquine or 800mg of Hydroxycloroquine in the first day, followed by 450mg of chloroquine of 400mg of hydroxychloroquine. Primary and secondary outcomes were evaluated on the 5th, 7th, 10th, 14th, 28th day after randomization.

Although the outcomes presented in the latest version were updated late on ClinicalTrials.org, on October 23, 2020, these outcomes were already present in the trial protocol approved by the Brazilian National Commission for Ethics in Research on April 8, 2020 (approval number: 3960331) and amending the protocol, approved by the same National Commission on May 25, 2020 (approval number: 4044848)
Study Started
Apr 16
Primary Completion
Aug 20
Study Completion
Sep 03
Last Update
May 12

Drug Chloroquine

5 days of treatment with Chloroquine + Standard Care

Drug Hydroxychloroquine

5 days of treatment with Hydroxychloroquine + Standard Care

Other standard care

Standard Care according to Brazilian Guidelines for treating COVID-19

Intervention Experimental

Treatment with either Chloroquine or Hydroxychloroquine according to what was available in the hospital: Chloroquine - 900mg on the first day, followed by 450mg in the next 4 days. Hydroxychloroquine - 800mg on the first day, followed by 450mg in the next 4 days. + Standard treatment available and recomended by the Brazilian Guidelines for COVID-19.

Control Active Comparator

Standard treatment available and recomended by the Brazilian Guidelines for COVID-19.


Inclusion Criteria:

Adult Males and non-pregnant females that accept and sign the informed consent.
Hospitalized with COVID-19 suspection that has collected the confirmatory test
To have at least one of thes symptoms: Fever, coughing, throat ache or runny nose.
To have at least one of these findings: radiological findings that indicates COVID-10 (bilatareal ground grass images); O2 saturation lower than 94% without supplementation and crackles in lung auscultation; Need of O2 supplementation; Need of Mechanical Ventilation.
Female patients must also agree to use efficient counterceptive methods during the evaluation period.

Exclusion Criteria:

Patients with psoriasis or other exfoliative disease, porphyria, epilepsy, myasthenia gravis, advanced liver failure or glucose-6-phosphate dehydrogenase deficiency.
ALT / AST> 5 times the upper limit of normal.
Severe chronic kidney disease in stage 4 or requiring dialysis (ie, eGFR <30).
Pregnancy or breastfeeding.
Early transfer to another hospital that is not a study site within 72 hours.
Severe heart disease and / or a history of cardiac arrhythmia.
Allergy to Chloroquine and / or Hydroxychloroquine.
No Results Posted