Prophylactic Benefit of Hydroxychloroquine in COVID-19 Cases With Mild to Moderate Symptoms and in Healthcare Workers With High Exposure Risk (PREVENT)
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ClinicalTrials.gov Identifier: NCT04371926 |
Recruitment Status :
Withdrawn
(Concerned about the adverse effects of HCQ)
First Posted : May 1, 2020
Last Update Posted : June 4, 2020
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
COVID-19 | Drug: Hydroxychloroquine Sulfate | Not Applicable |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 0 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Intervention Model Description: | Symptomatic patients will be randomized to hydroxychloroquine (HCQ) vs no-HCQ group. Similarly, hospital staff with high risk of exposure will be randomized to HCQ vs no-HCQ group |
Masking: | Single (Investigator) |
Primary Purpose: | Prevention |
Official Title: | Prophylactic Benefit of Hydroxychloroquine in COVID-19 Cases With Mild to Moderate Symptoms and in Healthcare Workers With High Exposure Risk (PREVENT) |
Estimated Study Start Date : | June 2020 |
Estimated Primary Completion Date : | June 2021 |
Estimated Study Completion Date : | July 2021 |

Arm | Intervention/treatment |
---|---|
Active Comparator: HCQ arm
COVID-19 positive cases will receive receive hydroxychloroquine sulfate 400 mg twice daily on the day of enrollment, then 200 mg twice daily for the next 4 days for a 5 day total course. Staff randomized to this group will receive HCQ sulfate 400 mg/week for 4 weeks |
Drug: Hydroxychloroquine Sulfate
Patients will receive hydroxychloroquine sulfate 400 mg twice daily on the day of enrollment, then 200 mg twice daily for the next 4 days for a 5 day total course. Staff will receive HCQ sulfate 400mg/week for 4 weeks |
No Intervention: No-HCQ arm
Will receive standard treatment as needed, but no HCQ
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- Time to reach normal body temperature [ Time Frame: 1 month ]Time to reach normal body temperature (TNBT), ≤37.50 C
- Development of COVID-19 symptoms during HCQ preventive therapy in staff [ Time Frame: 1 month ]Development of fever and/or other symptoms of COVID-19 during the 1 month of the HCQ therapy
- COVID-19 test result at follow-up in patients [ Time Frame: 6 days ]Viral RNA test results at day 6 will be compared between the HCQ vs no-HCQ group
- Worsening of symptoms in COVID-19 patients [ Time Frame: 1 month ]Worsening of symptoms in COVID-19 patients requiring artificial ventilation during the study period

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Ages Eligible for Study: | 18 Months to 85 Years (Child, Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Male or female over 18 years of age at the time of enrollment
- COVID-19 test positive patients with mild-moderate symptoms including fever >37.50 F
- Consecutive consenting staff at ICU, ER and COVID-19 unit that have never been diagnosed with COVID-19
Exclusion Criteria:
- Exclusion criteria:
- Hepatic cirrhosis or active hepatitis B or C
- Severe renal disease
- Hospitalized for severe symptoms of COVID-19 (ARDS), on mechanical ventilation or ECMO
- Contraindication to HCQ
- Using HCQ for some other condition (i.e. SLE, rheumatoid arthritis)
- Pregnant or breast feeding
- Known history of long QT syndrome (QTc >500 ms on electrocardiogram)
- Seizure disorder
- Body weight <50kg
- Psoriasis
- Unwilling to provide informed consent

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): NCT04371926
Principal Investigator: | Andrea Natale, MD | St. David's Medical Center |
Responsible Party: | Andrea Natale, Executive Medical Director, Texas Cardiac Arrhythmia Research Foundation |
ClinicalTrials.gov Identifier: | NCT04371926 |
Other Study ID Numbers: |
TCAI_PREVENT |
First Posted: | May 1, 2020 Key Record Dates |
Last Update Posted: | June 4, 2020 |
Last Verified: | April 2020 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Undecided |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
COVID-19 Respiratory Tract Infections Infections Pneumonia, Viral Pneumonia 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 |