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Showing 1–24 of 32 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Nitazoxanide Clear all
Terminated Phase 2 Interventional

Study of Nitazoxanide Tablets in the Treatment of Mild to Moderate Active Crohn's Disease

NCT00130390
View directory record Official record
Conditions
Crohn's Disease
Interventions
Nitazoxanide, Placebo
Drug · Other
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
18 Years and older
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
13
States / cities
Tampa, Florida • Zephyrhills, Florida • Marietta, Georgia + 10 more
Source: ClinicalTrials.gov public record
Updated May 30, 2012 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetic Study on G1090N (Nitazoxanide) Capsules in Healthy Volunteers

NCT07110441
View directory record Official record
Conditions
Acute-on-Chronic Liver Failure
Interventions
Single Dose G1090N, Multiple dosing of G1090N
Drug
Lead sponsor
Genfit
Industry
Eligibility
18 Years to 55 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Anaheim, California
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Nitazoxanide in the Treatment of Colds Due to Enterovirus/Rhinovirus Infection

NCT03605862
View directory record Official record
Conditions
Enterovirus, Rhinovirus
Interventions
Nitazoxanide, Placebo
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
12 Years and older
Enrollment
1,756 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
43
States / cities
Birmingham, Alabama • Pelham, Alabama • Hot Springs, Arkansas + 36 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2022 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Nitazoxanide Pharmacokinetic Parameters in Renal Impaired Subjects

NCT05368935
View directory record Official record
Conditions
Renal Impairment, Renal Disease, Kidney Disease
Interventions
Nitazoxanide
Drug
Lead sponsor
Genfit
Industry
Eligibility
18 Years to 80 Years
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
2
States / cities
Miami Lakes, Florida • Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Oct 27, 2022 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 2 Interventional Results available

Study of Nitazoxanide, Peginterferon Alfa-2a and Ribavirin for the Treatment of Hepatitis C

NCT00495391
View directory record Official record
Conditions
Chronic Hepatitis C
Interventions
Nitazoxanide, Placebo, Peginterferon alfa-2a, Ribavirin
Drug · Biological
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
18 Years and older
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
10
States / cities
Palo Alto, California • Stanford, California • New Haven, Connecticut + 7 more
Source: ClinicalTrials.gov public record
Updated May 7, 2014 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 3 Interventional Results available

A Phase III, Randomized, Double-Blind, Placebo Controlled Trial to Evaluate the Efficacy and Safety of Nitazoxanide in the Treatment of Uncomplicated Influenza

NCT03336619
View directory record Official record
Conditions
Influenza
Interventions
Nitazoxanide, Placebo
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
12 Years and older
Enrollment
1,030 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
34
States / cities
Alabaster, Alabama • Birmingham, Alabama • Hoover, Alabama + 28 more
Source: ClinicalTrials.gov public record
Updated Jun 27, 2022 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 1 Interventional

A Study of Nitazoxanide in the Treatment of AIDS-Related Diarrhea

NCT00002444
View directory record Official record
Conditions
HIV Infections
Interventions
Nitazoxanide
Drug
Lead sponsor
Unimed Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 1996
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 1, 2026, 4:51 PM EDT
Terminated Phase 3 Interventional

Safety and Effectiveness of Nitazoxanide for the Treatment of Cryptosporidiosis in AIDS Patients

NCT00004986
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Nitazoxanide
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
13 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 1, 2026, 4:51 PM EDT
Terminated Phase 2 Interventional Results available

Study of Nitazoxanide in Adults With Acute Uncomplicated Influenza

NCT01056380
View directory record Official record
Conditions
Influenza
Interventions
Nitazoxanide, Placebo
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
18 Years to 65 Years
Enrollment
79 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Elmira, New York
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Safety and Efficacy Study of Nitazoxanide in the Treatment of Acute Uncomplicated Influenza

NCT01227421
View directory record Official record
Conditions
Influenza
Interventions
Nitazoxanide, Placebo
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
12 Years to 65 Years
Enrollment
624 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Elmira, New York
Source: ClinicalTrials.gov public record
Updated Oct 11, 2023 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 3 Interventional Results available

Compassionate Use of Nitazoxanide for the Treatment of Clostridium Difficile Infection

NCT00304356
View directory record Official record
Conditions
Clostridium Enterocolitis, Pseudomembranous Colitis
Interventions
Nitazoxanide
Drug
Lead sponsor
Daniel M. Musher MD
Federal
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
2
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 14, 2017 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 3 Interventional

Trial to Evaluate the Efficacy and Safety of Nitazoxanide in the Treatment of Acute Uncomplicated Influenza

NCT02612922
View directory record Official record
Conditions
Influenza
Interventions
Nitazoxanide, Placebo
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
12 Years to 65 Years
Enrollment
325 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
17
States / cities
Hot Springs, Arkansas • Anaheim, California • Fresno, California + 14 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2018 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 2 Interventional Results available

Study of Nitazoxanide, Peginterferon Alfa-2a and Ribavirin in Treatment-Naive Hepatitis C Patients

NCT00637923
View directory record Official record
Conditions
Chronic Hepatitis C
Interventions
Nitazoxanide, Placebo, Peginterferon alfa-2a, Ribavirin
Drug · Biological
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
18 Years and older
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
10
States / cities
Palo Alto, California • New Haven, Connecticut • Bay Pines, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Feb 9, 2014 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 2 Interventional Results available

Nitazoxanide Plus Ribavirin and Peginterferon for Therapy of Treatment Naive HCV Genotype 1 and HIV Coinfected Subjects

NCT00991289
View directory record Official record
Conditions
HIV Infection, Hepatitis C Infection
Interventions
Nitazoxanide (NTZ), Pegylated interferon alfa-2a (PEG), Ribavirin (RBV)
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
17
States / cities
Birmingham, Alabama • Los Angeles, California • Palo Alto, California + 12 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2021 · Synced Sep 1, 2026, 4:51 PM EDT
Completed No phase listed Observational

Vancomycin vs. Nitazoxanide to Treat Recurrent C. Difficile Colitis

NCT00304889
View directory record Official record
Conditions
Clostridium Enterocolitis, Pseudomembranous Colitis, Antibiotic-Associated Colitis
Interventions
Not listed
Lead sponsor
Michael E. DeBakey VA Medical Center
Federal
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Sep 1, 2026, 4:51 PM EDT
Terminated Phase 3 Interventional Results available

Trial to Evaluate Efficacy and Safety of Nitazoxanide in the Treatment of Colds Due to Enterovirus/Rhinovirus Infection

NCT04489381
View directory record Official record
Conditions
Enterovirus, Rhinovirus
Interventions
Nitazoxanide, Placebo, Vitamin Super B-Complex
Drug · Dietary Supplement
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
12 Years to 120 Years
Enrollment
214 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
3
States / cities
Hot Springs, Arkansas • Fort Lauderdale, Florida • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 16, 2024 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 2 Interventional

A Study of Nitazoxanide in Patients With AIDS and Diarrhea Caused by Cryptosporidium

NCT00001081
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Nitazoxanide
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1998
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 31, 2021 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 3 Interventional Results available

Trial to Evaluate Efficacy and Safety of Nitazoxanide in the Treatment of Mild or Moderate COVID-19

NCT04486313
View directory record Official record
Conditions
COVID-19
Interventions
Nitazoxanide, Placebo, Vitamin Super B-Complex
Drug · Dietary Supplement
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
12 Years to 120 Years
Enrollment
935 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
2
States / cities
Fort Lauderdale, Florida • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Mar 28, 2024 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 1Phase 2 Interventional Results available

A Safety and Tolerability Study of Nitazoxanide in HIV-HCV Treatment Failures

NCT01185028
View directory record Official record
Conditions
Hepatitis C Infection, HIV Infection
Interventions
Nitazoxanide With Pegylated Interferon And Ribavirin
Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 99 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
4
States / cities
Washington D.C., District of Columbia • Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 4, 2021 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Nitazoxanide Pharmacokinetic Parameters in Hepatic Impaired Patients

NCT05116826
View directory record Official record
Conditions
Moderate Hepatic Impairment, Severe Hepatic Impairment, Liver Diseases
Interventions
Nitazoxanide
Drug
Lead sponsor
Genfit
Industry
Eligibility
18 Years to 75 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
2
States / cities
Miami Lakes, Florida • Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Oct 13, 2022 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 3 Interventional

Safety and Efficacy Study of Nitazoxanide in the Treatment of Acute Uncomplicated Influenza

NCT01610245
View directory record Official record
Conditions
Influenza
Interventions
Nitazoxanide, Oseltamivir, Placebo Oral Tablet, Placebo Oral Capsule
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
13 Years to 65 Years
Enrollment
1,941 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
136
States / cities
Birmingham, Alabama • Dothan, Alabama • Hoover, Alabama + 121 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2018 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 1 Interventional

A Pilot Study to Examine the Role of Nitazoxanide to Prevent Recurrence of Hepatitis C After Transplantation

NCT01074203
View directory record Official record
Conditions
Hepatitis C Recurrence
Interventions
Nitazoxanide
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 30, 2012 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 4 Interventional

Irritable Bowel Syndrome Evaluation and Treatment in Primary Care

NCT01641341
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Bifidobacterium infantis, Pancrelipase, Nitazoxanide, Placebo
Drug
Lead sponsor
American Academy of Family Physicians
Other
Eligibility
18 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
9
States / cities
Lomita, California • Leawood, Kansas • Baton Rouge, Louisiana + 4 more
Source: ClinicalTrials.gov public record
Updated Jan 22, 2019 · Synced Sep 1, 2026, 4:51 PM EDT
Completed Phase 2 Interventional Results available

NNITS-Nitazoxanide for Norovirus in Transplant Patients Study

NCT03395405
View directory record Official record
Conditions
Gastroenteritis Norovirus
Interventions
Nitazoxanide, Placebo
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
12 Years to 99 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
12
States / cities
Chicago, Illinois • Kansas City, Kansas • Baltimore, Maryland + 6 more
Source: ClinicalTrials.gov public record
Updated May 20, 2025 · Synced Sep 1, 2026, 4:51 PM EDT