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Trial record 1 of 1 for:    NCT01227967
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Comparing the Efficacy, Safety, and Tolerability of Combination Antivirals (Amantadine, Ribavirin, Oseltamivir) Versus Oseltamivir for the Treatment of Influenza in Adults at Risk for Complications (IRC003)

This study has been completed.
Information provided by (Responsible Party):
National Institute of Allergy and Infectious Diseases (NIAID) Identifier:
First received: October 22, 2010
Last updated: January 31, 2017
Last verified: January 2017
Seasonal influenza is responsible for many hospitalizations and deaths each year, despite effective antiviral treatments. Some individuals have medical conditions such as heart or lung diseases that make them particularly at risk of severe influenza infections that may result in hospitalization or death. Oseltamivir (Tamiflu) is used most often to treat flu, but there are still many hospitalizations, complications, and deaths even with treatment. This study will evaluate the use of combination antivirals (amantadine, oseltamivir, and ribavirin) compared to oseltamivir alone in the treatment of influenza in an at-risk population.

Condition Intervention Phase
Influenza Drug: Amantadine, Ribavirin, Oseltamivir Drug: Oseltamivir Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Participant, Investigator
Primary Purpose: Treatment
Official Title: A Randomized Double-Blind Phase 2 Study Comparing the Efficacy, Safety, and Tolerability of Combination Antivirals (Amantadine, Ribavirin, Oseltamivir Versus Oseltamivir for the Treatment of Influenza in Adults at Risk for Complications

Resource links provided by NLM:

Further study details as provided by National Institute of Allergy and Infectious Diseases (NIAID):

Primary Outcome Measures:
  • Evaluate the reproducibility of virologic samples, comparison between culture and PCR, and the impact of missing data between randomized groups. [ Time Frame: First 50 subjects ]
    The specific measure used for the primary endpoint will be determined by a pilot study of the first 50 subjects randomized which will evaluate the reproducibility of virologic samples, comparison between culture and PCR, and the impact of missing data between randomized groups.

Enrollment: 1200
Study Start Date: September 2010
Study Completion Date: September 2016
Primary Completion Date: September 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Combination Therapy
Amantadine, Ribavirin, Oseltamivir
Drug: Amantadine, Ribavirin, Oseltamivir
One capsule of Oseltamivir 75 mg x 2 - Total dose: 150 mg/day for 5 days; Three capsules of Ribavirin 200 mg for total of 600 mg x 2 - Total dose: 1200 mg/day for 5 days; One capsule of Amantadine 100 mg x 2 Total dose: 200 mg/day for 5 days
Active Comparator: Oseltamivir monotherapy
Drug: Oseltamivir
75 mg x 2 Total dose: 150 mg/day for 5 days

Detailed Description:

Seasonal influenza is responsible for approximately 226,000 excess hospitalizations annually and despite effective antivirals causes significant morbidity and mortality (estimated 24,000-50,000 deaths each year in the United States alone). The influenza virus that emerged in 2009 (A/California/07/2009 H1N1) caused fewer deaths (12,000 flu-related deaths in the U.S) but in contrast to seasonal flu, nearly 90 percent of the deaths with the 2009 H1N1 occurred among people younger than 65 years of age. The CDC has defined an at-risk population that is responsible for the majority of hospitalization and morbidity associated with influenza. This study will evaluate the use of combination antivirals as compared to oseltamivir alone in the treatment of influenza in an at-risk population.

Subjects who meet the CDC definition for being at-risk and that present with an influenza-like illness will be screened for the study. Those subjects with a confirmatory test for influenza (rapid antigen or PCR) will be randomized in a 1:1 manner to receive a blinded study treatment consisting of either the combination of amantadine, oseltamivir, and ribavirin or oseltamivir alone for 5 days. Clinical, virologic, and laboratory assessments on Days 1, 3, 7, 14, and 28 will be used for both safety and efficacy analysis.


- To evaluate the effectiveness of combined treatment with oseltamivir, amantadine, and ribavirin compared with oseltamivir alone for at-risk individuals with confirmed influenza infection.


- Individuals at least 18 years of age who have one or more medical conditions that may cause complications from influenza, and have developed an influenza-like illness.


  • Participants will be screened with a physical examination and medical history, along with blood tests and throat swabs to confirm influenza infection.
  • Eligible participants will be randomly assigned to take either oseltamivir alone (the current standard treatment for influenza) or to take oseltamivir, amantadine, and ribavirin. Participants will have additional blood samples and throat swabs taken at the start of the study, and will be shown how to complete a study diary at home.
  • Participants will receive a study medication kit containing the medication to take at home twice a day for 5 days.
  • Participants will return, with the medication kit, to the clinic on days 1 (the first day after the start of the study), 3, 7, 14, and 28. The first visit may take 2 to 3 hours, but each subsequent visit should take approximately 1 to 2 hours. Additional blood samples and throat swabs will be taken at these visits.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Enrollment (Screening)

  1. Signed informed consent prior to initiation of any study procedures
  2. Age greater than or equal to 18 years of age
  3. Presence of an underlying medical condition(s) that may increase risk of complications from influenza
  4. History of an influenza-like illness defined as:

    • One or more respiratory symptom (cough, sore throat, or nasal symptoms) AND
    • Either
    • Fever (subjective or documented >38 degrees C) OR
    • 1 or more constitutional symptom (headache, malaise, myalgia, sweats/chills or fatigue)
  5. Onset of illness no more than 96 hours before screening defined as when the subject experienced at least one respiratory symptom, constitutional symptom, or fever
  6. Willingness to have samples stored


  1. Signed informed consent
  2. Age greater than or equal to 18 years of age
  3. Presence of a medical condition(s) that have been associated with increased risk of complications from influenza

    • Age 65 years of age or older
    • Asthma
    • Neurological and neuro-developmental conditions (including disorders of the brain, spinal cord, peripheral nerve, and muscle such as cerebral palsy, epilepsy [seizure disorders], stroke, moderate to severe developmental delay, muscular dystrophy, or spinal cord injury) [though still able to provide informed consent per inclusion criteria #1]
    • Chronic lung disease (such as COPD and cystic fibrosis)
    • Heart disease (such as congenital heart disease, congestive heart failure, and coronary artery disease)
    • Blood disorders (excluding genetic causes of anemia, as noted in the exclusion criteria)
    • Endocrine disorders (such as diabetes mellitus)
    • Kidney disorders
    • Liver disorders
    • Metabolic disorders (such as inherited metabolic disorders and mitochondrial disorders)
    • Weakened immune system due to disease or medication (such as people with HIV/AIDS, or cancer, chronic steroids or other medications causing immune suppression)
    • BMI ≥ 40
  4. Onset of illness no more than 96 hours before screening defined as when the subject experienced at least one respiratory symptom, constitutional symptom, or fever
  5. Positive test for influenza (either rapid antigen or PCR)

    - Results from influenza testing obtained for clinical indications within 12 hours before screening/enrollment may be used if available. Randomization may proceed in cases of discrepant results (one positive and one negative)

  6. One of the following to avoid pregnancy:

    • Females who are able to become pregnant (i.e., are not postmenopausal, have not undergone surgical sterilization, and are sexually active with men) must agree to use at least 2 effective forms of contraception from the date of informed consent through 6 months after the last dose of study drug. At least one of the methods of contraception should be a barrier method
    • Males who have not undergone surgical sterilization and are sexually active with women must agree to use condoms plus have a partner use at least one additional effective form of contraception from the date of informed consent through 6 months after the last dose of study drug
  7. Willingness to have samples stored


(for Enrollment or Randomization)

  1. Women who are pregnant or breast-feeding, and men whose female partner(s) is pregnant
  2. Inability to take oral medication or a history of gastrointestinal malabsorption that would preclude the use of oral medication.
  3. Hemoglobin < 10 g/dL
  4. WBC < 1.5 times 10(9)/L
  5. Neutrophils < 0.75 x 10(9)/L
  6. Platelets < 50 x 10(9)/L
  7. History of genetic hemoglobinopathy (e.g., thalassemia major or sickle cell anemia) or autoimmune hemolytic anemia
  8. Received more than 2 doses of any antiviral influenza medications since onset of influenza symptoms
  9. Received stavudine (d4T), didanosine (ddI), zidovudine (AZT), or azathioprine within 30 days prior to study entry
  10. Creatinine clearance less than 60 mL/min (estimated by the Cockcroft-Gault equation using serum creatinine)
  11. History of autoimmune hepatitis
  12. Uncompensated liver disease (defined as AST > 3 times site upper limit of normal (ULN), ALT > 3 times ULN, or Direct Bilirubin > 2 times ULN)
  13. Clinical signs of end-stage liver disease including jaundice, coagulopathy, portal hypertension, esophageal varices, ascites, peripheral edema, gastrointestinal bleeding, or encephalopathy
  14. Chronic liver disease categorized as Child-Pugh class C (Child-Pugh score 10-15)
  15. Known hypersensitivity to rimantadine, amantadine, ribavirin, oseltamivir, peramivir, or zanamivir
  16. Received live attenuated virus vaccine (influenza or other) within 3 weeks prior to study entry
  17. Use of any investigational drug within 30 days or 5 half-lives (whichever is longer) prior to study entry
  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: NCT01227967

  Hide Study Locations
United States, Alabama
Simon Williamson Clinic
Birmingham, Alabama, United States, 35211
United States, Arizona
East Valley Family Physicians
Chandler, Arizona, United States, 85224
Thomas Lenzmeier Family Practice
Glendale, Arizona, United States, 85308
Central Phoenix Medical Center
Phoenix, Arizona, United States, 85020
United States, California
Costa Mesa, California, United States, 92626
Advanced Rx Clinical Research
Garden Grove, California, United States, 92843
Torrance Clinical Research Institute, Inc.
Lomita, California, United States, 90717
University of Southern California
Los Angeles, California, United States, 90033
University of California at San Diego
San Diego, California, United States, 92103
Westlake Medical Research (CA)
Thousand Oaks, California, United States, 91360
Los Angeles BioMedical Research Institute
Torrance, California, United States, 90502
Empire Clinical Research
Upland, California, United States, 91786
United States, Colorado
University of Colorado
Aurora, Colorado, United States, 80045
Centennial - IMMUNOe International Research
Centennial, Colorado, United States, 80112
United States, Florida
University of Florida
Gainesville, Florida, United States, 32610
Best Quality Research Inc.
Hialeah, Florida, United States, 33016
San Marcus Research Clinic, Inc.
Miami, Florida, United States, 33015
Medical Consulting Center
Miami, Florida, United States, 33125
Suncoast Research Group, LLC
Miami, Florida, United States, 33135
University of Miami
Miami, Florida, United States, 33136
DMI Research, Inc.
Pinellas Park, Florida, United States, 33782
United States, Illinois
Northwestern University
Chicago, Illinois, United States, 60611
Sneeze, Wheeze & Itch Associates, LLC
Normal, Illinois, United States, 61761
United States, Iowa
Ridge Family Practice
Council Bluffs, Iowa, United States, 51503
University of Iowa
Iowa City, Iowa, United States, 52246
United States, Kentucky
Research Integrity, LLC
Owensboro, Kentucky, United States, 42303
United States, Louisiana
Horizon Research Group, of Opelousas, LLC
Eunice, Louisiana, United States, 70535
Centex Studies Inc. - Dr. Seep
Lake Charles, Louisiana, United States, 70601
United States, Maryland
NIH Clinical Center
Bethesda, Maryland, United States, 20892
United States, Massachusetts
Boston Medical Center
Boston, Massachusetts, United States, 02111
Massachusetts General Hospital
Boston, Massachusetts, United States, 02114
Brigham and Women's Hospital
Boston, Massachusetts, United States, 02115
UMass Medical School
Worcester, Massachusetts, United States, 01655
United States, Michigan
Henry Ford Health Systems
Detroit, Michigan, United States, 48202
Bronson Methodist Hospital
Kalamazoo, Michigan, United States, 49007
United States, Missouri
West Florissant Internists
Bridgeton, Missouri, United States, 63044
United States, Nebraska
Clinical Research Advantage/ Skyline Medical Center
Elkhorn, Nebraska, United States, 68022
Prairie Fields Family Medicine
Freemont, Nebraska, United States, 68025
Southwest Family Physicians
Omaha, Nebraska, United States, 68124
United States, New Jersey
New Jersey Medical School
Newark, New Jersey, United States, 07103
United States, New York
James J. Peters, VA Medical Center
Bronx, New York, United States, 10468
Icahn School of Medicine at Mount Sinai
New York, New York, United States, 10029
University of Rochester Medical Center
Rochester, New York, United States, 14642
United States, North Carolina
University of North Carolina-Chapel Hill
Chapel Hill, North Carolina, United States, 27514
Duke University
Durham, North Carolina, United States, 27710
United States, Ohio
Clinical Research Solutions - Dr. Panuto
Middleburg Heights, Ohio, United States, 44130
United States, Pennsylvania
University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
University of Pittsburgh
Pittsburgh, Pennsylvania, United States, 15213
Montgomery Medical
Smithfield, Pennsylvania, United States, 15478
United States, South Dakota
Health Concepts
Rapid City, South Dakota, United States, 57702
United States, Tennessee
Clinical Research Solutions - Dr. Bart
Columbia, Tennessee, United States, 38401
Clinical Research Solutions - Dr. Slandzicki
Franklin, Tennessee, United States, 37064
Clinical Research Solutions - Dr. Hoppers
Jackson, Tennessee, United States, 38305
Holston Medical Group
Kingsport, Tennessee, United States, 37660
Clinical Research Solutions - Dr. Rowe
Nashville, Tennessee, United States, 37211
Clinical Research Solutions - Dr. Dar
Smyrna, Tennessee, United States, 37167
United States, Texas
University of Texas Tech Amarillo
Amarillo, Texas, United States, 79106
Family Medicine Associates of Texas
Carrollton, Texas, United States, 75010
3rd Coast Research Associates
Corpus Christi, Texas, United States, 78413
University of Texas at Houston
Houston, Texas, United States, 77030
Centex Studies Inc. - Dr. Pouzar
Houston, Texas, United States, 77062
Pioneer Research Solutions, Inc.
Houston, Texas, United States, 77098
Texas Tech HSC
Lubbock, Texas, United States, 79430
Centex Studies Inc. - Dr. Garcia
Pharr, Texas, United States, 78577
Village Health Partners
Plano, Texas, United States, 75024
Endeavor Clinical Trials
San Antonio, Texas, United States, 78229
Bandera Family Healthcare Research
San Antonio, Texas, United States, 78249
United States, Virginia
University of Virginia
Charlottesville, Virginia, United States, 22908
Virginia Commonwealth University
Richmond, Virginia, United States, 23298
Instituto Medico Platense
La Plata, Buenos Aires, Argentina
Hospital Houssay
Vicente Lopez, Provincia de Buenos Aires, Argentina
Centro de Educación Médica e Investigaciónes Clínicas (CEMIC)
Buenos Aires, Argentina
Fundación del Centro de Estudios Infectológicos (FUNCEI)
Buenos Aires, Argentina
Hospital General de Agudos J. M. Ramos Mejía
Buenos Aires, Argentina
Hospital Italiano de Buenos Aires
Buenos Aires, Argentina
Hospital Rawson
Cordoba, Argentina
Instituto Centralizado de Asistencia e Investigación Clínica Integral (CAICI)
Santa Fe, Argentina
Australia, New South Wales
Holdsworth House Med Practice
Darlinghurst, New South Wales, Australia, 2010
Taylor Square Private Clinic
Darlinghurst, New South Wales, Australia, 2010
Westmead Hospital
Westmead, New South Wales, Australia
Australia, Queensland
Royal Brisbane
Herston, Queensland, Australia, 4029
Australia, Victoria
Northside Clinic
Fitzroy North, Victoria, Australia, 3068
The Alfred Hospital
Melbourne, Victoria, Australia, 3004
Royal Melbourne Hospital
Parkville, Victoria, Australia, 3052
Instituto Nacional de Ciencias Médicas y Nutrición (INCMN) Salvador Zubirán
México City, Mexico
Hospital General y de Alta Especialidad "Dr. Manuel GEA Gonzalez"
Tlalpan, Mexico
Instituto Nacional de Enfermedades Respiratorias (INER)
Tlalpan, Mexico
Siriraj Hospital, Mahidol University
Bangkoknoi, Bangkok, Thailand, 10700
HIV-NAT, The Thai Red Cross AIDS
Patumwan, Bangkok, Thailand, 10330
Srinagarind Hospital, Khon Kaen University
Muang, Khon Kaen, Thailand, 40002
Bamrasnaradura Infectious Diseases Institute
Muang, Nonthaburi, Thailand, 11000
Sponsors and Collaborators
National Institute of Allergy and Infectious Diseases (NIAID)
Study Chair: John Beigel, MD Leidos Biomedical Research, Inc. in support of Clinical Research Section, LIR, NIAID, Natinal Institutes of Health
Study Chair: John Treanor, MD University of Rochester, School of Medicine and Dentistry
  More Information

Additional Information:
Responsible Party: National Institute of Allergy and Infectious Diseases (NIAID) Identifier: NCT01227967     History of Changes
Other Study ID Numbers: 10-I-0210
Study First Received: October 22, 2010
Last Updated: January 31, 2017

Keywords provided by National Institute of Allergy and Infectious Diseases (NIAID):
Adaptive Design
At Risk

Additional relevant MeSH terms:
Influenza, Human
Orthomyxoviridae Infections
RNA Virus Infections
Virus Diseases
Respiratory Tract Infections
Respiratory Tract Diseases
Antiviral Agents
Molecular Mechanisms of Pharmacological Action
Anti-Infective Agents
Antiparkinson Agents
Anti-Dyskinesia Agents
Dopamine Agents
Neurotransmitter Agents
Physiological Effects of Drugs
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Enzyme Inhibitors processed this record on June 27, 2017