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Study of Nitazoxanide in Adults With Acute Uncomplicated Influenza

This study has been terminated.
(Insufficient enrollment during 2009-2010 flu season, new study initiated.)
Information provided by (Responsible Party):
Romark Laboratories L.C. Identifier:
First received: January 23, 2010
Last updated: July 7, 2017
Last verified: July 2017
This is a randomized clinical trial designed to evaluate oral nitazoxanide compared to a placebo in the treatment of acute uncomplicated influenza in adults. We hypothesize that treatment with nitazoxanide will reduce the duration of symptoms in patients with confirmed influenza infection. Secondarily, we hypothesize that treatment with nitazoxanide will reduce the complications of influenza, severity of symptoms, time lost from work, time to return to normal daily activities, and viral shedding.

Condition Intervention Phase
Influenza Drug: Nitazoxanide Drug: Placebo Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase 2, Randomized, Double-Blind, Placebo-Controlled Study of Nitazoxanide in Adults With Acute Uncomplicated Influenza

Resource links provided by NLM:

Further study details as provided by Romark Laboratories L.C.:

Primary Outcome Measures:
  • Time to Resolution of All Clinical Symptoms of Influenza (Subjects With Confirmed Influenza Infection) [ Time Frame: Up to 28 days ]

Secondary Outcome Measures:
  • Time to Resolution of All Clinical Symptoms of Influenza (Subjects Infected With Any Respiratory Virus) [ Time Frame: Up to 28 days ]
  • Time to Resolution of All Clinical Symptoms of Influenza (All Treated Subjects) [ Time Frame: Up to 28 days ]
  • Time to Return to Normal Daily Activity (Subjects With Confirmed Influenza) [ Time Frame: Up to 28 days ]
  • Severity of Disease Expressed in Score-hours (Symptom Scores Multiplied by Duration of Symptoms in Hours) [ Time Frame: Up to 28 days ]
    Subjects recorded symptom severity as absent, mild, moderate, or severe (0-3, respectively) twice daily for at least seven days. The average severity score for each symptom was multiplied by the duration of the time period to which the score applied to arrive at score-hours for that period. For example, if a symptom was graded as '2' at 8:00 AM and '1' at 8:30 PM of the same day, the average score for that time period was 1.5, the time period was 12.5 hours, and the calculated number of score-hours for that period was 18.75. The score-hours for each time period were added and divided by the total number of hours.

  • Time Lost From Work (Subjects With Confirmed Influenza) [ Time Frame: Up to 28 days ]
  • Complications of Influenza Including Secondary Illnesses, Antibiotic Use and Hospitalizations (Subjects With Confirmed Influenza) [ Time Frame: Up to 28 days ]
  • Time to Cessation of Viral Shedding (Subjects With Confirmed Influenza) [ Time Frame: 28 days ]
  • Change in Influenza Virus Titer Assessed by Quantitative RT-PCR (Subjects With Confirmed Influenza) [ Time Frame: 4 days ]

Enrollment: 79
Study Start Date: January 2010
Study Completion Date: December 2010
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Nitazoxanide Drug: Nitazoxanide
Tablet, 500 mg with food twice daily for 5 days
Other Name: Alinia, NTZ
Placebo Comparator: Placebo Drug: Placebo
Tablet, twice daily with food for 5 days
Other Name: Sugar pill

Detailed Description:
The study is conducted at approximately 25 sites in the United States. Subjects selected based on symptoms will be randomized to receive oral nitazoxanide or placebo twice daily for 5 days. Subjects will be monitored by daily by telephone or home visit to monitor symptoms and complications of influenza for safety and will be referred for medical care as required. Subjects will complete a diary twice daily to record the presence and severity of symptoms, ability to perform normal daily activities and time lost from work. Complications of influenza (including sinusitis, otitis, bronchitis, pneumonia, central nervous system disease) and other adverse events will be reported. Nasopharyngeal swabs will be collected at Baseline (Day 0) and Day 7 for all patients and on Days 1 through 4 for a subset of patients to test for influenza A (including novel H1N1), influenza B and 17 other respiratory viruses by RT-PCR and culture and to evaluate quantitative viral shedding. The primary analysis will be for patients with confirmed influenza, and secondary analyses will be conducted for subjects with any respiratory virus and for all treated subjects.

Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age 18 to 65 years
  • Fever, respiratory symptoms and constitutional symptoms compatible with influenza infection
  • Influenza A or B infection in the local community
  • Onset of illness no more than 48 hours before presentation
  • Willing and able to provide comply with protocol requirements

Exclusion Criteria:

  • Severity of illness requiring or anticipated to require in-hospital care
  • High risk of complications from influenza per IDSA (Infectious Diseases Society of America) guidelines or current CDC (Centers for Disease Control) criteria
  • Females pregnant, breast-feeding or sexually active without birth control
  • Vaccination for seasonal influenza or H1N1 on or after August 1, 2009
  • Treatment with antiviral medication for influenza within 1 month prior to screening
  • Treatment with nitazoxanide or any investigational drug within 1 month prior to screening
  • Known sensitivity to nitazoxanide or any excipients
  • Unable to take oral medications
  • Chronic kidney or liver disease or known impaired hepatic and/or renal function
  • Other pre-existing chronic infection undergoing or requiring medical therapy
  • Pre-existing illness placing subject at unreasonably increased risk by participation in study
  • Unlikely to comply with the requirements of this protocol
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01056380

United States, New York
Health Sciences Research Center at Asthma and Allergy Associates, P.C.
Elmira, New York, United States, 14901
Sponsors and Collaborators
Romark Laboratories L.C.
Study Chair: Jean-François Rossignol, MD, PhD The Romark Institute for Medical Research
  More Information

Responsible Party: Romark Laboratories L.C. Identifier: NCT01056380     History of Changes
Other Study ID Numbers: RM01-2027
Study First Received: January 23, 2010
Results First Received: November 18, 2013
Last Updated: July 7, 2017

Keywords provided by Romark Laboratories L.C.:
influenza like illness

Additional relevant MeSH terms:
Influenza, Human
Orthomyxoviridae Infections
RNA Virus Infections
Virus Diseases
Respiratory Tract Infections
Respiratory Tract Diseases
Antiparasitic Agents
Anti-Infective Agents processed this record on August 23, 2017