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Niclosamide

Phase 2

COVID-19 | Small molecule | Infectious Disease |MetaVia Inc.|Last Updated: May 15, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment49

FDA Designations

No designations recorded

Clinical trial landscape

Niclosamide · 2 trials · 2 indications

Phase 2 1Phase 1 1
NCT04603924Study of Niclosamide in Moderate and Severe Hospitalized Coronavirus-19 (COVID-19) PatientsCOVID-19
COMPLETED49 Analytics
PHASE2COMPLETED
Study of Niclosamide in Moderate and Severe Hospitalized Coronavirus-19 (COVID-19) Patients
COVID-19Unlock trial analytics

Study Endpoints

Primary Endpoints

Number of Subjects Experiencing TEAEs
Randomization to Day 60

Incidence of Treatment Emergent Adverse Events (TEAEs)

Number of Subjects Experiencing TESAEs
Randomization to Day 60

Incidence of Treatment Emergent Serious Adverse Events (TESAEs)

SAD: Number of Subjects Reporting TEAEs and STEAEs
Baseline to Day 7.

Number of Subjects Reporting treatment-emergent AEs (TEAEs) and Serious treatment-emergent AEs (STEAEs) in the SAD

MAD: Number of Subjects Reporting TEAEs and STEAEs
Baseline to Day 14.

Number of Subjects Reporting treatment-emergent AEs (TEAEs) and Serious treatment-emergent AEs (STEAEs) in the MAD

SAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in ECG Parameters
Baseline to Day 7

Number of Subjects with Clinically Significant changes in ECG parameters from Baseline (PR, QRS, QT, and QTc intervals)

MAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in ECG Parameters
Baseline to Day 14

Number of Subjects with Clinically Significant changes in ECG parameters from Baseline (PR, QRS, QT, and QTc intervals)

SAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in Haematology
Baseline to Day 7

Number of Subjects with Clinically Significant changes in Haematology (Basophils (%),Eosinophils (%, Ery. Mean Corpuscular Hemoglobin, Ery. Mean Corpuscular Volume, Erythrocytes (10\^12/L), Hematocrit (%), Hemoglobin (g/dL). Hemoglobin (g/dL), Lymphocytes (%), Monocytes (%), Neutrophils (%)' Platelets (10\^9/L), Reticulocytes (%))

MAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in Haematology
Baseline to Day 14

Number of Subjects with Clinically Significant changes in Haematology (Basophils (%),Eosinophils (%, Ery. Mean Corpuscular Hemoglobin, Ery. Mean Corpuscular Volume, Erythrocytes (10\^12/L), Hematocrit (%), Hemoglobin (g/dL). Hemoglobin (g/dL), Lymphocytes (%), Monocytes (%), Neutrophils (%)' Platelets (10\^9/L), Reticulocytes (%))

SAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in Serum Chemistry
Baseline to Day 7

Number of Subjects with Clinically Significant changes in Serum Chemistry (Alanine Aminotransferase (U/L), Alkaline Phosphatase (U/L), Aspartate Aminotransferase (U/L), Bilirubin (mg/dL), Calcium (mg/dL), Creatinine (mg/dL), Direct Bilirubin (mg/dL, Glucose (mg/dL), Potassium (mmol/L), Protein (g/dL), Sodium (mmol/L), Urea Nitrogen (mg/dL)

MAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in Serum Chemistry
Baseline to Day 14

Number of Subjects with Clinically Significant changes in Serum Chemistry (Alanine Aminotransferase (U/L), Alkaline Phosphatase (U/L), Aspartate Aminotransferase (U/L), Bilirubin (mg/dL), Calcium (mg/dL), Creatinine (mg/dL), Direct Bilirubin (mg/dL, Glucose (mg/dL), Potassium (mmol/L), Protein (g/dL), Sodium (mmol/L), Urea Nitrogen (mg/dL)

SAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in Urinalysis
Baseline to Day 7

Number of Subjects with Clinically Significant changes in Urinalysis (Specific Gravity, Urobilinogen (EU), pH)

MAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in Urinalysis
Baseline to Day 14

Number of Subjects with Clinically Significant changes in Urinalysis (Specific Gravity, Urobilinogen (EU), pH)

SAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in Vital Signs
Baseline to Day 7

Number of Subjects with Clinically Significant changes in Vital Signs from Baseline (Diastolic Blood Pressure, Systolic Blood Pressure (mmHg), Pulse Rate (beats/min), Respiratory Rate (breaths/min))

MAD: Safety and Tolerability of ANA001 as Measured by Clinically Significant Changes in Vital Signs
Baseline to Day 14

Number of Subjects with Clinically Significant changes in Vital Signs from Baseline (Diastolic Blood Pressure, Systolic Blood Pressure (mmHg), Pulse Rate (beats/min), Respiratory Rate (breaths/min))

Secondary Endpoints

Median Time to Hospital Discharge
Randomization to Day 60
Median Time to 2-point Improvement WHO Clinical Improvement Scale
Randomization to Day 60
Median Time to Resolution of COVID-19 Symptoms
Randomization to Day 60
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ANA001EXPERIMENTALSubjects in the ANA001 treatment arm will receive 1,000 mg (4 capsules; 250 mg each) by mouth twice per day for 7 consecutive days with a meal. If the participant requires mechanical ventilation over the course of the study, ANA001 may be administered via nasogastric (NG), percutaneous endoscopic gastrostomy (PEG) or orogastric (OG) tube and, if possible, should be administered with a scheduled nasogastric (NG) or orogastric (OG) feeding.
Matching PlaceboPLACEBO_COMPARATORSubjects in the comparator arm will receive matching placebo (hydroxypropylmethylcellulose (HPMC)) (4 capsules, by mouth twice a day) for the 7-day treatment duration.
SAD Cohort 1: ANA001 1000 mg poEXPERIMENTALSubjects will receive a 1000 mg single oral dose of ANA001 with a standardized light meal presented at 4 x 250 mg capsules. Each capsule is 250 mg.
SAD Cohort 2: ANA001 2000 mg poEXPERIMENTALSubjects will a 2000 mg single oral dose of ANA001 with a standardized light meal presented at 8 x 250 mg capsules. Each capsule is 250 mg.
SAD Cohort 3: ANA001 3000 mg poEXPERIMENTALSubjects will a 3000 mg single oral dose of ANA001 with a standardized light meal presented at 12 x 250 mg capsules. Each capsule is 250 mg.
SAD Cohorts 1, 2 & 3: Pooled Matching PlaceboPLACEBO_COMPARATORSubjects will receive matching placebo hydroxypropylmethylcellulose (HPMC) as a single oral dose (4, 8, or 12 capsules) with a standardized light meal.
MAD Cohort 1: ANA001 1000 mg po BIDEXPERIMENTALSubjects will receive an oral dose of 1000mg ANA001 twice daily (BID) with a standardized light meal for 7 consecutive days. Each dose will be presented as 4 250mg capsules.
MAD Cohort 2: ANA001 1000 mg po TIDEXPERIMENTALSubjects will receive an oral dose of 1000mg ANA001 three times daily (TID) with a standardized light meal for 7 consecutive days. Each dose will be presented as 4 250mg capsules.
MAD Cohorts 1 & 2: Pooled Matching PlaceboPLACEBO_COMPARATORSubjects will receive an oral dose of matching Placebo to ANA001 two (BID) three times daily (TID) with a standardized light meal for 7 consecutive days. Each dose will be presented as 4 250mg capsules of hydroxypropylmethylcellulose (HPMC)

Interventions

NameTypeDescription
NiclosamideDRUGNiclosamide is an antihelmintic with in-vitro antiviral activity
PlaceboDRUGMatching hydroxypropylmethylcellulose HPMC capsules with no active ingredients
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites8

Key Inclusion Criteria: 1. Provide written informed consent prior to performing study procedures 2. Hospitalized. 3. Male or female ≥18 years of age 4. Positive for severe acute respiratory syndrome coronavirus 2 5. Presence of symptoms of lower respiratory tract infection (LRTI) including at least...

Countries:United States
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Frequently asked questions about Niclosamide

What is Niclosamide used for?

Niclosamide is an investigational small molecule being studied for COVID-19. It has been evaluated in a Phase 2 trial in moderate and severe hospitalized COVID-19 patients, and in a Phase 1 trial in healthy volunteers. It is not approved for any use.

Who makes Niclosamide?

Niclosamide is being developed by MetaVia Inc. (NASDAQ: MTVA). The company has conducted clinical trials of the drug in the United States.

What phase is Niclosamide in?

Niclosamide has completed a Phase 2 trial for COVID-19 and a Phase 1 trial in healthy volunteers. Both trials are completed, and the drug remains investigational, not approved by the FDA.

What clinical trials is Niclosamide in?

Niclosamide has been studied in two completed trials: NCT04603924, a Phase 2 study in moderate and severe hospitalized COVID-19 patients, and NCT04705415, a Phase 1 single and multiple ascending dose study in healthy volunteers. Both were conducted in the United States.

Is Niclosamide the same as other COVID-19 treatments?

Niclosamide is a distinct small molecule being investigated for COVID-19. It has been tested in a randomized, double-blind, placebo-controlled Phase 2 trial in hospitalized patients, but no alternative names for the drug have been reported.