Full Anticoagulation Versus Prophylaxis in COVID-19: COALIZAO ACTION Trial (ACTION)
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ClinicalTrials.gov Identifier: NCT04394377 |
Recruitment Status :
Completed
First Posted : May 19, 2020
Last Update Posted : June 10, 2021
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Pragmatic randomized clinical trial of patients admitted to the hospital with confirmed COVID-19 infection and elevated D-Dimer.
Randomization 1:1 - Group 1 will undergo a routine full anticoagulation (oral or parenteral when needed) strategy; and group 2 will receive usual standard of care with prophylactic anticoagulation
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Coronavirus Infection | Drug: Group 1: Rivaroxaban 20mg/d followed by enoxaparin/unfractionated heparin when needed Drug: Group 2: control group with enoxaparin 40mg/d | Phase 4 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 615 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Single (Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | Randomized Clinical Trial to Evaluate a Routine Full Anticoagulation Strategy in Patients With Coronavirus (COVID-19) - COALIZAO ACTION Trial |
Actual Study Start Date : | June 21, 2020 |
Actual Primary Completion Date : | March 26, 2021 |
Actual Study Completion Date : | May 30, 2021 |

Arm | Intervention/treatment |
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Group 1
The routine full anticoagulation strategy will be applied for 30 days. In this strategy, full anticoagulation therapy will be maintained for all patients randomized to group 1 and, depending on the patient's clinical condition, there will be 2 possible routes of administration (oral or parenteral):
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Drug: Group 1: Rivaroxaban 20mg/d followed by enoxaparin/unfractionated heparin when needed
Routine full anticoagulation strategy |
Group 2
Patients in this group will receive the usual standard management and currently have no indication of full anticoagulation. Venous thromboembolism (VTE) prophylaxis should be used in group 2 (usual standard of care) as recommended by guidelines.
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Drug: Group 2: control group with enoxaparin 40mg/d
Usual standard of care and currently have no indication of full anticoagulation. |
- Hierarchical composite endpoint composed of mortality, number of days alive, number of days in the hospital and number of days with oxygen therapy at the end of 30 days. [ Time Frame: In 30 days ]The primary objective will be analyzed using the win ratio approach comparing every participant of treatment group to every participant of control group to determine a winner.
- Incidence of Venous thromboembolism [ Time Frame: In 30 days ]
- Incidence of acute myocardial infarction [ Time Frame: In 30 days ]
- Incidence of stroke [ Time Frame: In 30 days ]
- Number of days using oxygen therapy [ Time Frame: In 30 days ]
- Peak of troponin [ Time Frame: In 30 days ]
- Peak of D-dimer [ Time Frame: In 30 days ]
- Incidence of Major bleeding and clinically relevant non-major bleeding by the ISTH criteria [ Time Frame: In 30 days ]It will be considered the main safety endpoint

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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:
- Patients with confirmed diagnosis of COVID-19 admitted to hospital;
- Duration of symptoms related to hospitalization ≤ 14 days;
- Patients ≥ 18 year old;
- D-dimer above the upper limit of normal (collected until 72 hours before the randomization);
- Agreement to participate by providing the informed consent form (ICF).
Exclusion Criteria:
- Patients with indication for full anticoagulation during inclusion (for example, diagnosis of venous thromboembolism, atrial fibrillation, mechanical valve prosthesis);
- Platelets < 50,000 /mm3
- Need for ASA therapy > 100 mg;
- Need for P2Y12 inhibitor therapy (clopidogrel, ticagrelor or prasugrel);
- Chronic use of non-hormonal anti-inflammatory drugs;
- Sustained uncontrolled systolic blood pressure (BP) of ≥180 mmHg or diastolic BP of ≥100 mmHg;
- INR > 1,5;
- Patients contraindicated to full anticoagulation (active bleeding, liver failure, blood dyscrasia or prohibitive hemorrhage risk as evaluated by the investigator);
- Criteria for disseminated intravascular coagulation (DIC);
- A history of hemorrhagic stroke or any intracranial bleeding at any time in the past or current intracranial neoplasm (benign or malignant), cerebral metastases, arteriovenous (AV) malformation, or aneurysm;
- Active cancer (excluding non-melanoma skin cancer) defined as cancer not in remission or requiring active chemotherapy or adjunctive therapies such as immunotherapy or radiotherapy;
- Hypersensitivity to rivaroxaban;
- Use of strong inhibitors of cytochrome P450 (CYP) 3A4 and/or P-glycoprotein (P-gp) (e.g. protease inhibitors, ketoconazole, Itraconazole) and/or use of P-gp and strong CYP3A4 inducers (such as but not limited to rifampin/rifampicin, rifabutin, rifapentine, phenytoin, phenobarbital, carbamazepine, or St. John's Wort);
- Known HIV infection;
- Creatinine clearance < 30 ml/min according to the Cockcroft-Gault Formula;
- Pregnancy or breastfeeding.

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): NCT04394377

Study Chair: | Renato D. Lopes, MD, PhD | BCRI |
Responsible Party: | Brazilian Clinical Research Institute |
ClinicalTrials.gov Identifier: | NCT04394377 |
Other Study ID Numbers: |
002/2020 |
First Posted: | May 19, 2020 Key Record Dates |
Last Update Posted: | June 10, 2021 |
Last Verified: | May 2020 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Plan Description: | All data provided during study is anonymized to respect the privacy of patients who have participated in the trial in line with applicable regulations. |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
SARS-CoV2 Anticoagulation Coronavirus infection COVID-19 |
COVID-19 Coronavirus Infections Infections Pneumonia, Viral Pneumonia Respiratory Tract Infections Virus Diseases Coronaviridae Infections Nidovirales Infections RNA Virus Infections Lung Diseases Respiratory Tract Diseases Heparin |
Enoxaparin Calcium heparin Rivaroxaban Enoxaparin sodium Anticoagulants Fibrinolytic Agents Fibrin Modulating Agents Molecular Mechanisms of Pharmacological Action Factor Xa Inhibitors Antithrombins Serine Proteinase Inhibitors Protease Inhibitors Enzyme Inhibitors |