A Single and Multiple Ascending Dose Study of Niclosamide in Healthy Volunteers

Inclusion Criteria

• Sign the study informed consent form
• Man or woman, 18 to 65 years of age inclusive at the time of signing the informed consent form
• Overtly healthy as determined by medical evaluation
• Body mass index (BMI) within 18 to 30.0 kg/m2 (inclusive) and body weight not less than 50 kg
• Blood pressure at Screening and Day -1 between 90 and 140 mmHg systolic, inclusive, and no higher than 90 mmHg diastolic.
• A 12-lead electrocardiogram (ECG) at Screening consistent with normal cardiac conduction and function, including:
• Sinus rhythm
• Pulse rate between 50 and 100 beats per minute (bpm)
• QTc interval 450 milliseconds (QT interval corrected using Fridericia correction method [QTcF])
• QRS interval of 12 months
• If male, must agree to use contraception methods outlined for the study during the treatment period and for at least 30 days (a spermatogenesis cycle) after the last dose of study treatment and refrain from donating sperm during this period
• If female, is not pregnant, not breastfeeding, and meets at least one of the following conditions:

Not a woman of childbearing potential (WOCBP)

OR

A WOCBP who agrees to follow the contraceptive guidance during the treatment period and for at least 30 days (one menstrual cycle) after the last dose of study treatment.

Exclusion Criteria

• Has a history of or current clinically significant medical illness including but not limited to, cardiac arrhythmias or other cardiac disease; hematologic disease; coagulation disorders (including any abnormal bleeding or blood dyscrasias); lipid abnormalities; significant pulmonary disease, including bronchospastic respiratory disease; diabetes mellitus; hepatic or renal insufficiency (creatinine clearance below 60 mL/min); thyroid disease; neurologic or psychiatric disease; infection; or any other illness that the Investigator considers should exclude the subject or that could interfere with the interpretation of the study results.
• Has known allergy to niclosamide or salicylate-containing medications.
• Clinically significant abnormal values for hematology, clinical chemistry, or urinalysis at screening.
• Clinically significant abnormal physical examination, vital signs or 12 lead ECG at screening.
• Has a history of human immunodeficiency virus (HIV) antibody positive, or tests positive for HIV; has a history of hepatitis B surface antigen (HBsAg) or hepatitis C antibody (anti-HCV) positive, or other clinically active liver disease, or tests positive for HBsAg or anti-HCV at Screening.
• History of drug or alcohol abuse according to Diagnostic and Statistical Manual of Mental Disorders (4th edition) criteria within 5 years before screening or positive test result(s) for alcohol and/or drugs of abuse at screening and admission
• Has received an investigational drug or used an invasive investigational medical device within 1 month or within a period less than 10 times the drug's half-life, whichever is longer, before Day 1.
• Has preplanned surgery or procedures that would interfere with the conduct of the study
• Is an employee of the Investigator or study site, with direct involvement in the proposed study or other studies under the direction of that Investigator or study site, as well as family members of the employees or the Investigator