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Completed Phase 1Phase 2 Interventional Results available

Leflunomide for the Treatment of Severe COVID-19 in Patients With a Concurrent Malignancy

ClinicalTrials.gov ID: NCT04532372

Public ClinicalTrials.gov record NCT04532372. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Sep 7, 2026, 10:03 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Phase 1/2 Trial of Leflunomide for the Treatment of Severe COVID-19 in Patients With a Concurrent Malignancy

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This phase I/II trial investigates the best dose and side effects of leflunomide and how well it works in treating patients with COVID-19 and a past or present cancer. Leflunomide has been used since the 1990s as a treatment for rheumatoid arthritis. Experiments done with human cells that were given severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus causing COVID-19, showed that leflunomide was able to reduce the ability of the virus to make copies of itself. The coronavirus uses ribonucleic acid (RNA), a very long molecule that contains genetic information that is like a blueprint for making more copies of itself. Leflunomide inhibits the formation of RNA. The information gained from this study may help researchers to learn whether leflunomide is safe for use in treating patients with COVID-19, and whether it is potentially effective against the disease.

Study identification

NCT ID
NCT04532372
Recruitment status
Completed
Study type
Interventional
Phase
Phase 1, Phase 2
Enrollment
2 participants

Conditions and interventions

Eligibility (public fields only)

Age range
18 Years and older
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Jan 6, 2021
Primary completion
Aug 25, 2021
Completion
Oct 26, 2021
Last update posted
Jul 2, 2024

2021

United States locations

U.S. sites
1
U.S. states
1
U.S. cities
1
Facility City State ZIP Site status
City of Hope Medical Center Duarte California 91010

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT04532372, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Jul 2, 2024 · Synced Sep 7, 2026

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Open the official record

The complete protocol, eligibility criteria, and contact information for NCT04532372 live on ClinicalTrials.gov.

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