Back to resultsA Study of S-033188 (Baloxavir Marboxil) Compared With Placebo or Oseltamivir in Otherwise Healthy Patients With Influenza (CAPSTONE 1)
Primary Purpose
Influenza
Status
Completed
Phase
Phase 3
Locations
Study Type
Interventional
Intervention
Baloxavir Marboxil
Placebo to Baloxavir Marboxil
Oseltamivir
Placebo to Oseltamivir
Sponsored by
About this trial
This is an interventional treatment trial for Influenza focused on measuring Flu, Baloxavir Marboxil, Oseltamivir, Tamiflu®
Eligibility Criteria
Inclusion Criteria:
- Patients who are able to understand the study and comply with all study procedures, and willing to provide written informed consent/assent prior to the predose examinations appropriately. As for adolescent patients, informed consent/assent of voluntary participation should be obtained in accordance with local requirements
- Male or female patients aged ≥ 12 to ≤ 64 years at the time of signing the informed consent/assent form.
Patients with a diagnosis of influenza virus infection confirmed by all of the following:
- Fever ≥ 38ºC (axillary) in the predose examinations or > 4 hours after dosing of antipyretics if they were taken
At least one of the following general systemic symptoms associated with influenza are present with a severity of moderate or greater
- Headache
- Feverishness or chills
- Muscle or joint pain
- Fatigue
At least one of the following respiratory symptoms associated with influenza are present with a severity of moderate or greater
- Cough
- Sore throat
- Nasal congestion
The time interval between the onset of symptoms and the predose examinations is 48 hours or less. The onset of symptoms is defined as either:
- Time of the first increase in body temperature (an increase of at least 1ºC from normal body temperature)
- Time when the patient experiences at least one general or respiratory symptom
- Women of childbearing potential who agree to use a highly effective method of contraception for 3 months after the first dose of study drug
Exclusion Criteria:
- Patients with severe influenza virus infection requiring inpatient treatment.
- Patients aged ≥ 20 years with known allergy to oseltamivir (Tamiflu®).
Patients with any of the following risk factors
- Women who are pregnant or within 2 weeks post-partum
- Residents of long-term care facilities (eg, welfare facilities for the elderly, nursing homes)
- Chronic respiratory diseases including bronchial asthma
- Neurological and neurodevelopmental disorders including disorders of the brain, spinal cord, peripheral nerve, and muscle (eg, cerebral palsy, epilepsy [seizure disorders], stroke, intellectual disability, moderate to severe developmental delay, muscular dystrophy, or spinal cord injury)
- Heart disease (such as congenital heart disease, congestive heart failure, or coronary artery disease), excluding hypertension without any other heart-related symptoms)
- American Indians and Alaskan natives
- Blood disorders (such as sickle cell disease)
- Endocrine disorders (including diabetes mellitus)
- Kidney disorders
- Liver disorders
- Metabolic disorders
- Compromised immune system (including patients receiving immunosuppressant therapy, or those with cancer or human immunodeficiency virus [HIV] infection)
- Morbid obesity (body mass index [BMI] ≥ 40)
- Patients unable to swallow tablets or capsules.
- Patients who have previously received Baloxavir Marboxil.
- Patients weighing < 40 kg
- Patients who have been exposed to an investigational drug within 30 days prior to the predose examinations.
Women who are breastfeeding or have a positive pregnancy test in the predose examinations. The following female patients who have documentation of either a or b below do not need to undergo a pregnancy test in the predose examinations:
- Postmenopausal (defined as cessation of regular menstrual periods for 2 years or more and confirmed by a follicle-stimulating hormone test) women
- Women who are surgically sterile by hysterectomy, bilateral oophorectomy, or tubal ligation
- Patients with concurrent infections requiring systemic antimicrobial and/or antiviral therapy at the predose examinations.
- Patients who have received peramivir, laninamivir, oseltamivir, zanamivir, rimantadine, umifenovir, or amantadine within 30 days prior to the predose examinations.
- Patients who have received an investigational monoclonal antibody for a viral disease in the last year.
- Patients with severe underlying diseases.
- Patients with known creatinine clearance ≤ 60 mL/min.
- Patients who, in the opinion of the investigator, would be unlikely to comply with required study visits, self-assessments, and interventions
Sites / Locations
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Arm 5
Arm Type
Experimental
Active Comparator
Placebo Comparator
Experimental
Placebo Comparator
Arm Label
Adults: Baloxavir Marboxil
Adults: Oseltamivir
Adults: Placebo
Adolescents: Baloxavir Marboxil
Adolescents: Placebo
Arm Description
Participants aged 20 to 64 years will receive two or four 20 mg baloxavir marboxil tablets orally on Day 1 and one oseltamivir placebo capsule orally twice a day (BID) on Days 1 to 5.
Participants aged 20 to 64 years will receive 75 mg oseltamivir twice a day on Days 1 to 5 and two or four baloxavir marboxil placebo tablets on Day 1.
Participants aged 20 to 64 years will receive two or four baloxavir marboxil placebo tablets on Day 1 and one oseltamivir placebo capsule orally twice a day on Days 1 to 5.
Participants aged 12 to 19 years will receive two or four baloxavir marboxil 20 mg tablets on Day 1.
Participants aged 12 to 19 years will receive two or four baloxavir marboxil placebo tablets on Day 1.
Outcomes
Primary Outcome Measures
Time to Alleviation of Symptoms in Participants Randomized to Baloxavir or Placebo
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of symptoms was defined as the time from the start of the study treatment to the time when all seven influenza-related symptoms were assessed by the participant as absent (0) or mild (1) for at least 21.5 hours.
Time to alleviation of symptoms was analyzed using the Kaplan-Meier (KM) method; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time to Alleviation of Symptoms in Adults Randomized to Baloxavir or Oseltamivir
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of symptoms was defined as the time from the start of the study treatment to the time when all seven influenza-related symptoms were assessed by the participant as absent (0) or mild (1) for at least 21.5 hours.
Time to alleviation of symptoms was analyzed using the Kaplan-Meier(KM) method; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Secondary Outcome Measures
Percentage of Participants With Positive Influenza Virus Titer at Each Time Point in Participants Randomized to Baloxavir or Placebo
Virus titer was quantified from nasopharyngeal swabs (or throat swabs if nasopharyngeal swabbing was not feasible) by tissue culture methods. Positive influenza virus titer was defined as virus titer not less than the lower limit of quantification (0.7 log₁₀ of the 50% tissue culture infective dose (TCID₅₀/mL) among those assessed for virus titer on Days 2, 3, 4, 5, 6 and 9.
Percentage of Participants With Positive Influenza Virus Titer at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Virus titer was quantified from nasopharyngeal swabs (or throat swabs if nasopharyngeal swabbing was not feasible) by tissue culture methods. Positive influenza virus titer was defined as virus titer not less than the lower limit of quantification (0.7 log₁₀ of the 50% tissue culture infective dose (TCID₅₀/mL) among those assessed for virus titer on Days 2, 3, 4, 5, 6 and 9.
Percentage of Participants With Positive Influenza Virus by RT-PCR at Each Time Point in Participants Randomized to Baloxavir or Placebo
Influenza virus ribonucleic acid (RNA) was quantified from nasopharyngeal swabs (or throat swabs, if nasopharyngeal swabbing was not feasible). The percentage of participants with detectable virus RNA (2.05 for flu A and 2.83 for flu B log₁₀ virus particles/mL) among those assessed measured by reverse transcription polymerase chain reaction (RT-PCR) on Days 2, 3, 4, 5, 6 and 9.
Percentage of Participants With Positive Influenza Virus by RT-PCR at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Influenza virus RNA was quantified from nasopharyngeal swabs (or throat swabs, if nasopharyngeal swabbing was not feasible). The percentage of participants with detectable virus RNA (2.05 for flu A and 2.83 for flu B log₁₀ virus particles/mL) among those assessed measured by reverse transcription polymerase chain reaction (RT-PCR) on Days 2, 3, 4, 5, 6 and 9.
Change From Baseline in Virus Titer at Each Time Point in Participants Randomized to Baloxavir or Placebo
Virus titer was quantified from nasopharyngeal swabs (or throat swabs if nasopharyngeal swabbing was not feasible) by tissue culture methods.
If virus titer was less than the lower limit of quantification, the virus titer was imputed 0.7 (TCID₅₀/mL).
Change From Baseline in Virus Titer at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Virus titer was quantified from nasopharyngeal swabs (or throat swabs if nasopharyngeal swabbing was not feasible) by tissue culture methods.
If virus titer was less than the lower limit of quantification, the virus titer was imputed 0.7 (TCID₅₀/mL).
Change From Baseline in Virus RNA (RT-PCR) at Each Time Point in Participants Randomized to Baloxavir or Placebo
Nasopharyngeal swabs (or throat swabs, if nasopharyngeal swabbing was not feasible) were obtained for viral quantitation. Virus RNA is measured by reverse transcription polymerase chain reaction (RT-PCR).
Change From Baseline in Virus RNA (RT-PCR) at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Nasopharyngeal swabs (or throat swabs, if nasopharyngeal swabbing was not feasible) were obtained for viral quantitation. Virus RNA was measured by reverse transcription polymerase chain reaction (RT-PCR).
Area Under the Curve (AUC) Adjusted by Baseline in Influenza Virus Titer in Participants Randomized to Baloxavir or Placebo
This endpoint was defined as AUC of change from Baseline in virus titer from Day 1 to Day 9. AUC was calculated using the trapezoidal method.
Area Under the Curve (AUC) Adjusted by Baseline in Influenza Virus Titer in Adults Randomized to Baloxavir or Oseltamivir
This endpoint was defined as AUC of change from Baseline in virus titer from Day 1 to Day 9. AUC was calculated using the trapezoidal method.
Area Under the Curve (AUC) Adjusted by Baseline of Influenza Virus RNA in Participants Randomized to Baloxavir or Placebo
This endpoint was defined as AUC of change from baseline in the amount of virus RNA (RT-PCR) from Day 1 to Day 9. The AUC was calculated using the trapezoidal method.
Area Under the Curve (AUC) Adjusted by Baseline of Influenza Virus RNA in Adults Randomized to Baloxavir or Oseltamivir
This endpoint was defined as AUC of change from baseline in the amount of virus RNA (RT-PCR) from Day 1 to Day 9. The AUC was calculated using the trapezoidal method.
Time to Cessation of Viral Shedding Determined by Virus Titer in Participants Randomized to Baloxavir or Placebo
Time to cessation of viral shedding by virus titer was defined as the time between the initiation of the study treatment and first time when the virus titer was below the limit of detection (0.7 log₁₀[TCID₅₀/mL]). The median and 95% confidence interval (CI) for time to cessation of viral shedding determined by virus titer was analyzed using the Kaplan-Meier (KM) method; participants whose virus titer had not reached cessation by the last observation time point were treated as censored at that time point.
Time to Cessation of Viral Shedding Determined by Virus Titer in Adults Randomized to Baloxavir or Oseltamivir
Time to cessation of viral shedding by virus titer was defined as the time between the initiation of the study treatment and first time when the virus titer was below the limit of detection (0.7 log₁₀[TCID₅₀/mL]). The time to cessation of viral shedding determined by virus titer was analyzed using the Kaplan-Meier (KM) method; participants whose virus titer had not reached cessation by the last observation time point were treated as censored at that time point.
Time to Cessation of Viral Shedding Determined by Virus RNA in Participants Randomized to Baloxavir or Placebo
Time to cessation of viral shedding by RT-PCR was defined as the time between the initiation of the study treatment and first time when the virus RNA was below the limit of detection measured by RT-PCR.
Time to cessation of viral shedding by RT-PCR was analyzed using the KM method; participants whose virus RNA had not reached cessation by the last observation time point were treated as censored at that time point.
Time to Cessation of Viral Shedding Determined by Virus RNA in Adults Randomized to Baloxavir or Oseltamivir
Time to cessation of viral shedding by RT-PCR was defined as the time between the initiation of the study treatment and first time when the virus RNA was below the limit of detection measured by RT-PCR.
Time to cessation of viral shedding by RT-PCR was analyzed using the KM method; participants whose virus RNA had not reached cessation by the last observation time point were treated as censored at that time point.
Percentage of Participants Whose Symptoms Were Alleviated at Each Time Point in Participants Randomized to Baloxavir or Placebo
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms). Alleviation of symptoms was defined as all seven influenza-related symptoms assessed by the participant as absent (0) or mild (1) .
Percentage of Participants Whose Symptoms Were Alleviated at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms). Alleviation of symptoms was defined as all seven influenza-related symptoms assessed by the participant as absent (0) or mild (1) .
Time to Alleviation of the Four Systemic Symptoms in Participants Randomized to Baloxavir or Placebo
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of the 4 systemic symptoms was defined as the time between the initiation of the study treatment to the time when all 4 systemic symptoms (headache, feverishness or chills, muscle or joint pain, and fatigue) were assessed by the participant as 0 (None) or 1 (Mild) for a duration of at least 21.5 hours.
Time to alleviation of the 4 systemic symptoms was analyzed using KM methods; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time to Alleviation of the Four Systemic Symptoms in Adults Randomized to Baloxavir or Oseltamivir
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of the 4 systemic symptoms was defined as the time between the initiation of the study treatment to the time when all 4 systemic symptoms (headache, feverishness or chills, muscle or joint pain, and fatigue) were assessed by the participant as 0 (None) or 1 (Mild) for a duration of at least 21.5 hours.
Time to alleviation of the 4 systemic symptoms was analyzed using KM methods; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time to Alleviation of the Three Respiratory Symptoms in Participants Randomized to Baloxavir or Placebo
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms). Time to alleviation of the 3 respiratory symptoms was defined as the time from the start of study treatment to the time when all 3 respiratory symptoms (cough, sore throat and nasal congestion) were assessed by the participant as absent (0) or mild (1) for at least 21.5 hours.
Time to alleviation of the 3 respiratory symptoms was analyzed using the KM method; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time to Alleviation of the Three Respiratory Symptoms in Adults Randomized to Baloxavir or Oseltamivir
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms). Time to alleviation of the 3 respiratory symptoms was defined as the time from the start of study treatment to the time when all 3 respiratory symptoms (cough, sore throat and nasal congestion) were assessed by the participant as absent (0) or mild (1) for at least 21.5 hours.
Time to alleviation of the 3 respiratory symptoms was analyzed using the KM method; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Change From Baseline in Composite Symptom Score at Each Time Point in Participants Randomized to Baloxavir or Placebo
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
The composite symptom score is the total score of the 7 influenza symptoms as assessed by the participant, and ranges from 0 to 21.
Change From Baseline in Composite Symptom Score at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
The composite symptom score is the total score of the 7 influenza symptoms as assessed by the participant, and ranges from 0 to 21.
Time to Resolution of Fever in Participants Randomized to Baloxavir or Placebo
Time to resolution of fever was defined as the time between the initiation of the study treatment and the resolution of fever. The resolution of fever was defined as the time when the participant's self-measured axillary temperature became less than 37ºC and was maintained at less than 37ºC for a duration of at least 12 hours.
Time to resolution of fever was analyzed using KM methods; participants who did not experience resolution of fever by the last observation time point were censored at that time point.
Time to Resolution of Fever in Adults Randomized to Baloxavir or Oseltamivir
Time to resolution of fever was defined as the time between the initiation of the study treatment and the resolution of fever. The resolution of fever was defined as the time when the participant's self-measured axillary temperature became less than 37ºC and was maintained at less than 37ºC for a duration of at least 12 hours.
Time to resolution of fever was analyzed using KM methods; participants who did not experience resolution of fever by the last observation time point were censored at that time point.
Percentage of Participants Reporting Normal Temperature at Each Time Point in Participants Randomized to Baloxavir or Placebo
Defined as the percentage of patients whose axillary temperature dropped to less than 37ºC after the initiation of study treatment.
Percentage of Participants Reporting Normal Temperature at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Defined as the percentage of patients whose axillary temperature dropped to less than 37ºC after the initiation of study treatment.
Body Temperature at Each Time Point in Participants Randomized to Baloxavir or Placebo
Participant's self-measured axillary temperature using an electronic thermometer.
Body Temperature at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Participant's self-measured axillary temperature using an electronic thermometer.
Time to Alleviation of Individual Symptoms in Participants Randomized to Baloxavir or Placebo
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of each symptom was defined as the time from the start of treatment to the start of the time period when the individual symptom was assessed by the participant as 0 (None) or 1 (Mild) for a duration of at least 21.5 hours.
Time to Alleviation of Individual Symptoms in Adults Randomized to Baloxavir or Oseltamivir
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of each symptom was defined as the time from the start of treatment to the start of the time period when the individual symptom was assessed by the participant as 0 (None) or 1 (Mild) for a duration of at least 21.5 hours.
Time to Return to Preinfluenza Health Status in Participants Randomized to Baloxavir or Placebo
Participants were asked to record their preinfluenza health status on a scale from 0 (worst possible health) to 10 (normal health [for someone your age and your health condition]), and their health status every day after initiation of study treatment on the same scale. Return to preinfluenza health status was defined as time from the initiation of the study treatment to the first time when the health status score was equal to or higher than the preinfluenza health status score.
Time to return to preinfluenza health status was analyzed using KM methods; participants with a smaller number on the scale for health status by the last observation time point were censored at that time point.
Time to Return to Preinfluenza Health Status in Adults Randomized to Baloxavir or Oseltamivir
Participants were asked to record their preinfluenza health status on a scale from 0 (worst possible health) to 10 (normal health [for someone your age and your health condition]), and their health status every day after initiation of study treatment on the same scale. Return to preinfluenza health status was defined as time from the initiation of the study treatment to the first time when the health status score was equal to or higher than the preinfluenza health status score.
Time to return to preinfluenza health status was analyzed using KM methods; participants with a smaller number on the scale for health status by the last observation time point were censored at that time point.
Percentage of Participants With Influenza-related Complications in Participants Randomized to Baloxavir or Placebo
The percentage of participants who experienced each influenza-related complication (hospitalization, death, sinusitis, otitis media, bronchitis, and radiologically confirmed pneumonia) as an adverse event after the initiation of the study treatment.
Percentage of Participants With Influenza-related Complications in Adults Randomized to Baloxavir or Oseltamivir
The percentage of participants who experienced each influenza-related complication (hospitalization, death, sinusitis, otitis media, bronchitis, and radiologically confirmed pneumonia) as an adverse event after the initiation of the study treatment.
Percentage of Participants With Adverse Events (AEs)
Full Information
1. Study Identification
Unique Protocol Identification Number
NCT02954354
Brief Title
A Study of S-033188 (Baloxavir Marboxil) Compared With Placebo or Oseltamivir in Otherwise Healthy Patients With Influenza
Acronym
CAPSTONE 1
Official Title
A Phase 3, Multicenter, Randomized, Double-blind Study of a Single Dose of S-033188 (Baloxavir Marboxil) Compared With Placebo or Oseltamivir 75 mg Twice Daily for 5 Days in Otherwise Healthy Patients With Influenza
Study Type
Interventional
2. Study Status
Record Verification Date
April 2019
Overall Recruitment Status
Completed
Study Start Date
December 8, 2016 (Actual)
Primary Completion Date
April 4, 2017 (Actual)
Study Completion Date
April 24, 2017 (Actual)
3. Sponsor/Collaborators
Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Shionogi
4. Oversight
Data Monitoring Committee
No
5. Study Description
Brief Summary
The primary objective of this study is to evaluate the efficacy of a single, oral dose of baloxavir marboxil compared with placebo by measuring the time to alleviation of symptoms in patients with uncomplicated influenza virus infection.
6. Conditions and Keywords
Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Influenza
Keywords
Flu, Baloxavir Marboxil, Oseltamivir, Tamiflu®
7. Study Design
Primary Purpose
Treatment
Study Phase
Phase 3
Interventional Study Model
Parallel Assignment
Masking
ParticipantInvestigator
Allocation
Randomized
Enrollment
1436 (Actual)
8. Arms, Groups, and Interventions
Arm Title
Adults: Baloxavir Marboxil
Arm Type
Experimental
Arm Description
Participants aged 20 to 64 years will receive two or four 20 mg baloxavir marboxil tablets orally on Day 1 and one oseltamivir placebo capsule orally twice a day (BID) on Days 1 to 5.
Arm Title
Adults: Oseltamivir
Arm Type
Active Comparator
Arm Description
Participants aged 20 to 64 years will receive 75 mg oseltamivir twice a day on Days 1 to 5 and two or four baloxavir marboxil placebo tablets on Day 1.
Arm Title
Adults: Placebo
Arm Type
Placebo Comparator
Arm Description
Participants aged 20 to 64 years will receive two or four baloxavir marboxil placebo tablets on Day 1 and one oseltamivir placebo capsule orally twice a day on Days 1 to 5.
Arm Title
Adolescents: Baloxavir Marboxil
Arm Type
Experimental
Arm Description
Participants aged 12 to 19 years will receive two or four baloxavir marboxil 20 mg tablets on Day 1.
Arm Title
Adolescents: Placebo
Arm Type
Placebo Comparator
Arm Description
Participants aged 12 to 19 years will receive two or four baloxavir marboxil placebo tablets on Day 1.
Intervention Type
Drug
Intervention Name(s)
Baloxavir Marboxil
Other Intervention Name(s)
S-033188
Intervention Description
2 to4 X 20-mg tablets taken orally
Intervention Type
Drug
Intervention Name(s)
Placebo to Baloxavir Marboxil
Intervention Description
2 to4 X 20-mg tablets taken orally
Intervention Type
Drug
Intervention Name(s)
Oseltamivir
Other Intervention Name(s)
Tamiflu®
Intervention Description
75 mg capsules taken orally
Intervention Type
Drug
Intervention Name(s)
Placebo to Oseltamivir
Intervention Description
Placebo capsules matching oseltamivir 75 mg capsules
Primary Outcome Measure Information:
Title
Time to Alleviation of Symptoms in Participants Randomized to Baloxavir or Placebo
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of symptoms was defined as the time from the start of the study treatment to the time when all seven influenza-related symptoms were assessed by the participant as absent (0) or mild (1) for at least 21.5 hours.
Time to alleviation of symptoms was analyzed using the Kaplan-Meier (KM) method; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Time to Alleviation of Symptoms in Adults Randomized to Baloxavir or Oseltamivir
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of symptoms was defined as the time from the start of the study treatment to the time when all seven influenza-related symptoms were assessed by the participant as absent (0) or mild (1) for at least 21.5 hours.
Time to alleviation of symptoms was analyzed using the Kaplan-Meier(KM) method; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time Frame
Initiation of study treatment up to Day 14
Secondary Outcome Measure Information:
Title
Percentage of Participants With Positive Influenza Virus Titer at Each Time Point in Participants Randomized to Baloxavir or Placebo
Description
Virus titer was quantified from nasopharyngeal swabs (or throat swabs if nasopharyngeal swabbing was not feasible) by tissue culture methods. Positive influenza virus titer was defined as virus titer not less than the lower limit of quantification (0.7 log₁₀ of the 50% tissue culture infective dose (TCID₅₀/mL) among those assessed for virus titer on Days 2, 3, 4, 5, 6 and 9.
Time Frame
Days 2, 3, 4 (optional), 5, 6 (optional), and 9
Title
Percentage of Participants With Positive Influenza Virus Titer at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Description
Virus titer was quantified from nasopharyngeal swabs (or throat swabs if nasopharyngeal swabbing was not feasible) by tissue culture methods. Positive influenza virus titer was defined as virus titer not less than the lower limit of quantification (0.7 log₁₀ of the 50% tissue culture infective dose (TCID₅₀/mL) among those assessed for virus titer on Days 2, 3, 4, 5, 6 and 9.
Time Frame
Days 2, 3, 4 (optional), 5, 6 (optional), and 9
Title
Percentage of Participants With Positive Influenza Virus by RT-PCR at Each Time Point in Participants Randomized to Baloxavir or Placebo
Description
Influenza virus ribonucleic acid (RNA) was quantified from nasopharyngeal swabs (or throat swabs, if nasopharyngeal swabbing was not feasible). The percentage of participants with detectable virus RNA (2.05 for flu A and 2.83 for flu B log₁₀ virus particles/mL) among those assessed measured by reverse transcription polymerase chain reaction (RT-PCR) on Days 2, 3, 4, 5, 6 and 9.
Time Frame
Days 2, 3, 4 (optional), 5, 6 (optional), and 9
Title
Percentage of Participants With Positive Influenza Virus by RT-PCR at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Description
Influenza virus RNA was quantified from nasopharyngeal swabs (or throat swabs, if nasopharyngeal swabbing was not feasible). The percentage of participants with detectable virus RNA (2.05 for flu A and 2.83 for flu B log₁₀ virus particles/mL) among those assessed measured by reverse transcription polymerase chain reaction (RT-PCR) on Days 2, 3, 4, 5, 6 and 9.
Time Frame
Days 2, 3, 4 (optional), 5, 6 (optional), and 9
Title
Change From Baseline in Virus Titer at Each Time Point in Participants Randomized to Baloxavir or Placebo
Description
Virus titer was quantified from nasopharyngeal swabs (or throat swabs if nasopharyngeal swabbing was not feasible) by tissue culture methods.
If virus titer was less than the lower limit of quantification, the virus titer was imputed 0.7 (TCID₅₀/mL).
Time Frame
Day 1 pretreatment (Baseline) and Days 2, 3, 4 (optional), 5, 6 (optional), and 9
Title
Change From Baseline in Virus Titer at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Description
Virus titer was quantified from nasopharyngeal swabs (or throat swabs if nasopharyngeal swabbing was not feasible) by tissue culture methods.
If virus titer was less than the lower limit of quantification, the virus titer was imputed 0.7 (TCID₅₀/mL).
Time Frame
Day 1 pretreatment (Baseline) and Days 2, 3, 4 (optional), 5, 6 (optional), and 9
Title
Change From Baseline in Virus RNA (RT-PCR) at Each Time Point in Participants Randomized to Baloxavir or Placebo
Description
Nasopharyngeal swabs (or throat swabs, if nasopharyngeal swabbing was not feasible) were obtained for viral quantitation. Virus RNA is measured by reverse transcription polymerase chain reaction (RT-PCR).
Time Frame
Day 1 pretreatment (Baseline) and Days 2, 3, 4 (optional), 5, 6 (optional), and 9
Title
Change From Baseline in Virus RNA (RT-PCR) at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Description
Nasopharyngeal swabs (or throat swabs, if nasopharyngeal swabbing was not feasible) were obtained for viral quantitation. Virus RNA was measured by reverse transcription polymerase chain reaction (RT-PCR).
Time Frame
Day 1 pretreatment (Baseline) and Days 2, 3, 4 (optional), 5, 6 (optional), and 9
Title
Area Under the Curve (AUC) Adjusted by Baseline in Influenza Virus Titer in Participants Randomized to Baloxavir or Placebo
Description
This endpoint was defined as AUC of change from Baseline in virus titer from Day 1 to Day 9. AUC was calculated using the trapezoidal method.
Time Frame
Day 1 to Day 9
Title
Area Under the Curve (AUC) Adjusted by Baseline in Influenza Virus Titer in Adults Randomized to Baloxavir or Oseltamivir
Description
This endpoint was defined as AUC of change from Baseline in virus titer from Day 1 to Day 9. AUC was calculated using the trapezoidal method.
Time Frame
Day 1 to Day 9
Title
Area Under the Curve (AUC) Adjusted by Baseline of Influenza Virus RNA in Participants Randomized to Baloxavir or Placebo
Description
This endpoint was defined as AUC of change from baseline in the amount of virus RNA (RT-PCR) from Day 1 to Day 9. The AUC was calculated using the trapezoidal method.
Time Frame
Day 1 to Day 9
Title
Area Under the Curve (AUC) Adjusted by Baseline of Influenza Virus RNA in Adults Randomized to Baloxavir or Oseltamivir
Description
This endpoint was defined as AUC of change from baseline in the amount of virus RNA (RT-PCR) from Day 1 to Day 9. The AUC was calculated using the trapezoidal method.
Time Frame
Day 1 to Day 9
Title
Time to Cessation of Viral Shedding Determined by Virus Titer in Participants Randomized to Baloxavir or Placebo
Description
Time to cessation of viral shedding by virus titer was defined as the time between the initiation of the study treatment and first time when the virus titer was below the limit of detection (0.7 log₁₀[TCID₅₀/mL]). The median and 95% confidence interval (CI) for time to cessation of viral shedding determined by virus titer was analyzed using the Kaplan-Meier (KM) method; participants whose virus titer had not reached cessation by the last observation time point were treated as censored at that time point.
Time Frame
Day 1 to Day 9
Title
Time to Cessation of Viral Shedding Determined by Virus Titer in Adults Randomized to Baloxavir or Oseltamivir
Description
Time to cessation of viral shedding by virus titer was defined as the time between the initiation of the study treatment and first time when the virus titer was below the limit of detection (0.7 log₁₀[TCID₅₀/mL]). The time to cessation of viral shedding determined by virus titer was analyzed using the Kaplan-Meier (KM) method; participants whose virus titer had not reached cessation by the last observation time point were treated as censored at that time point.
Time Frame
Day 1 to Day 9
Title
Time to Cessation of Viral Shedding Determined by Virus RNA in Participants Randomized to Baloxavir or Placebo
Description
Time to cessation of viral shedding by RT-PCR was defined as the time between the initiation of the study treatment and first time when the virus RNA was below the limit of detection measured by RT-PCR.
Time to cessation of viral shedding by RT-PCR was analyzed using the KM method; participants whose virus RNA had not reached cessation by the last observation time point were treated as censored at that time point.
Time Frame
Day 1 to Day 9
Title
Time to Cessation of Viral Shedding Determined by Virus RNA in Adults Randomized to Baloxavir or Oseltamivir
Description
Time to cessation of viral shedding by RT-PCR was defined as the time between the initiation of the study treatment and first time when the virus RNA was below the limit of detection measured by RT-PCR.
Time to cessation of viral shedding by RT-PCR was analyzed using the KM method; participants whose virus RNA had not reached cessation by the last observation time point were treated as censored at that time point.
Time Frame
Day 1 to Day 9
Title
Percentage of Participants Whose Symptoms Were Alleviated at Each Time Point in Participants Randomized to Baloxavir or Placebo
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms). Alleviation of symptoms was defined as all seven influenza-related symptoms assessed by the participant as absent (0) or mild (1) .
Time Frame
12, 24, 36, 48, 72, 96, 120, 144, 168, 192 and 216 hours after the initial dose of study treatment
Title
Percentage of Participants Whose Symptoms Were Alleviated at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms). Alleviation of symptoms was defined as all seven influenza-related symptoms assessed by the participant as absent (0) or mild (1) .
Time Frame
12, 24, 36, 48, 72, 96, 120, 144, 168, 192 and 216 hours after the initial dose of study treatment
Title
Time to Alleviation of the Four Systemic Symptoms in Participants Randomized to Baloxavir or Placebo
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of the 4 systemic symptoms was defined as the time between the initiation of the study treatment to the time when all 4 systemic symptoms (headache, feverishness or chills, muscle or joint pain, and fatigue) were assessed by the participant as 0 (None) or 1 (Mild) for a duration of at least 21.5 hours.
Time to alleviation of the 4 systemic symptoms was analyzed using KM methods; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Time to Alleviation of the Four Systemic Symptoms in Adults Randomized to Baloxavir or Oseltamivir
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of the 4 systemic symptoms was defined as the time between the initiation of the study treatment to the time when all 4 systemic symptoms (headache, feverishness or chills, muscle or joint pain, and fatigue) were assessed by the participant as 0 (None) or 1 (Mild) for a duration of at least 21.5 hours.
Time to alleviation of the 4 systemic symptoms was analyzed using KM methods; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Time to Alleviation of the Three Respiratory Symptoms in Participants Randomized to Baloxavir or Placebo
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms). Time to alleviation of the 3 respiratory symptoms was defined as the time from the start of study treatment to the time when all 3 respiratory symptoms (cough, sore throat and nasal congestion) were assessed by the participant as absent (0) or mild (1) for at least 21.5 hours.
Time to alleviation of the 3 respiratory symptoms was analyzed using the KM method; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Time to Alleviation of the Three Respiratory Symptoms in Adults Randomized to Baloxavir or Oseltamivir
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms). Time to alleviation of the 3 respiratory symptoms was defined as the time from the start of study treatment to the time when all 3 respiratory symptoms (cough, sore throat and nasal congestion) were assessed by the participant as absent (0) or mild (1) for at least 21.5 hours.
Time to alleviation of the 3 respiratory symptoms was analyzed using the KM method; participants who did not experience alleviation of symptoms were censored at the last observation time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Change From Baseline in Composite Symptom Score at Each Time Point in Participants Randomized to Baloxavir or Placebo
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
The composite symptom score is the total score of the 7 influenza symptoms as assessed by the participant, and ranges from 0 to 21.
Time Frame
Day 1 pretreatment (Baseline) and 12, 24, 36, 48, 72, 96, 120, 144, 168, 192, and 216 hours after the initial dose of study treatment.
Title
Change From Baseline in Composite Symptom Score at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
The composite symptom score is the total score of the 7 influenza symptoms as assessed by the participant, and ranges from 0 to 21.
Time Frame
Day 1 pretreatment (Baseline) and 12, 24, 36, 48, 72, 96, 120, 144, 168, 192, and 216 hours after the initial dose of study treatment.
Title
Time to Resolution of Fever in Participants Randomized to Baloxavir or Placebo
Description
Time to resolution of fever was defined as the time between the initiation of the study treatment and the resolution of fever. The resolution of fever was defined as the time when the participant's self-measured axillary temperature became less than 37ºC and was maintained at less than 37ºC for a duration of at least 12 hours.
Time to resolution of fever was analyzed using KM methods; participants who did not experience resolution of fever by the last observation time point were censored at that time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Time to Resolution of Fever in Adults Randomized to Baloxavir or Oseltamivir
Description
Time to resolution of fever was defined as the time between the initiation of the study treatment and the resolution of fever. The resolution of fever was defined as the time when the participant's self-measured axillary temperature became less than 37ºC and was maintained at less than 37ºC for a duration of at least 12 hours.
Time to resolution of fever was analyzed using KM methods; participants who did not experience resolution of fever by the last observation time point were censored at that time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Percentage of Participants Reporting Normal Temperature at Each Time Point in Participants Randomized to Baloxavir or Placebo
Description
Defined as the percentage of patients whose axillary temperature dropped to less than 37ºC after the initiation of study treatment.
Time Frame
12, 24, 36, 48, 72, 96, 120, 144, 168, 192 and 216 hours after the initial dose of study treatment
Title
Percentage of Participants Reporting Normal Temperature at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Description
Defined as the percentage of patients whose axillary temperature dropped to less than 37ºC after the initiation of study treatment.
Time Frame
12, 24, 36, 48, 72, 96, 120, 144, 168, 192 and 216 hours after the initial dose of study treatment
Title
Body Temperature at Each Time Point in Participants Randomized to Baloxavir or Placebo
Description
Participant's self-measured axillary temperature using an electronic thermometer.
Time Frame
12, 24, 36, 48, 72, 96 and 120 hours after the initial dose of study treatment
Title
Body Temperature at Each Time Point in Adults Randomized to Baloxavir or Oseltamivir
Description
Participant's self-measured axillary temperature using an electronic thermometer.
Time Frame
12, 24, 36, 48, 72, 96 and 120 hours after the initial dose of study treatment
Title
Time to Alleviation of Individual Symptoms in Participants Randomized to Baloxavir or Placebo
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of each symptom was defined as the time from the start of treatment to the start of the time period when the individual symptom was assessed by the participant as 0 (None) or 1 (Mild) for a duration of at least 21.5 hours.
Time Frame
Initiation of study treatment up to Day 14
Title
Time to Alleviation of Individual Symptoms in Adults Randomized to Baloxavir or Oseltamivir
Description
Participants assessed the severity of seven influenza-associated symptoms (cough, sore throat, headache, nasal congestion, feverishness or chills, muscle or joint pain, and fatigue) on a 4-point scale (with 0 indicating no symptoms, 1 mild symptoms, 2 moderate symptoms, and 3 severe symptoms).
Time to alleviation of each symptom was defined as the time from the start of treatment to the start of the time period when the individual symptom was assessed by the participant as 0 (None) or 1 (Mild) for a duration of at least 21.5 hours.
Time Frame
Initiation of study treatment up to Day 14
Title
Time to Return to Preinfluenza Health Status in Participants Randomized to Baloxavir or Placebo
Description
Participants were asked to record their preinfluenza health status on a scale from 0 (worst possible health) to 10 (normal health [for someone your age and your health condition]), and their health status every day after initiation of study treatment on the same scale. Return to preinfluenza health status was defined as time from the initiation of the study treatment to the first time when the health status score was equal to or higher than the preinfluenza health status score.
Time to return to preinfluenza health status was analyzed using KM methods; participants with a smaller number on the scale for health status by the last observation time point were censored at that time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Time to Return to Preinfluenza Health Status in Adults Randomized to Baloxavir or Oseltamivir
Description
Participants were asked to record their preinfluenza health status on a scale from 0 (worst possible health) to 10 (normal health [for someone your age and your health condition]), and their health status every day after initiation of study treatment on the same scale. Return to preinfluenza health status was defined as time from the initiation of the study treatment to the first time when the health status score was equal to or higher than the preinfluenza health status score.
Time to return to preinfluenza health status was analyzed using KM methods; participants with a smaller number on the scale for health status by the last observation time point were censored at that time point.
Time Frame
Initiation of study treatment up to Day 14
Title
Percentage of Participants With Influenza-related Complications in Participants Randomized to Baloxavir or Placebo
Description
The percentage of participants who experienced each influenza-related complication (hospitalization, death, sinusitis, otitis media, bronchitis, and radiologically confirmed pneumonia) as an adverse event after the initiation of the study treatment.
Time Frame
Initiation of study treatment up to Day 14
Title
Percentage of Participants With Influenza-related Complications in Adults Randomized to Baloxavir or Oseltamivir
Description
The percentage of participants who experienced each influenza-related complication (hospitalization, death, sinusitis, otitis media, bronchitis, and radiologically confirmed pneumonia) as an adverse event after the initiation of the study treatment.
Time Frame
Initiation of study treatment up to Day 14
Title
Percentage of Participants With Adverse Events (AEs)
Time Frame
From first dose of study drug to Day 22
10. Eligibility
Sex
All
Minimum Age & Unit of Time
12 Years
Maximum Age & Unit of Time
64 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria:
Patients who are able to understand the study and comply with all study procedures, and willing to provide written informed consent/assent prior to the predose examinations appropriately. As for adolescent patients, informed consent/assent of voluntary participation should be obtained in accordance with local requirements
Male or female patients aged ≥ 12 to ≤ 64 years at the time of signing the informed consent/assent form.
Patients with a diagnosis of influenza virus infection confirmed by all of the following:
Fever ≥ 38ºC (axillary) in the predose examinations or > 4 hours after dosing of antipyretics if they were taken
At least one of the following general systemic symptoms associated with influenza are present with a severity of moderate or greater
Headache
Feverishness or chills
Muscle or joint pain
Fatigue
At least one of the following respiratory symptoms associated with influenza are present with a severity of moderate or greater
Cough
Sore throat
Nasal congestion
The time interval between the onset of symptoms and the predose examinations is 48 hours or less. The onset of symptoms is defined as either:
Time of the first increase in body temperature (an increase of at least 1ºC from normal body temperature)
Time when the patient experiences at least one general or respiratory symptom
Women of childbearing potential who agree to use a highly effective method of contraception for 3 months after the first dose of study drug
Exclusion Criteria:
Patients with severe influenza virus infection requiring inpatient treatment.
Patients aged ≥ 20 years with known allergy to oseltamivir (Tamiflu®).
Patients with any of the following risk factors
Women who are pregnant or within 2 weeks post-partum
Residents of long-term care facilities (eg, welfare facilities for the elderly, nursing homes)
Chronic respiratory diseases including bronchial asthma
Neurological and neurodevelopmental disorders including disorders of the brain, spinal cord, peripheral nerve, and muscle (eg, cerebral palsy, epilepsy [seizure disorders], stroke, intellectual disability, moderate to severe developmental delay, muscular dystrophy, or spinal cord injury)
Heart disease (such as congenital heart disease, congestive heart failure, or coronary artery disease), excluding hypertension without any other heart-related symptoms)
American Indians and Alaskan natives
Blood disorders (such as sickle cell disease)
Endocrine disorders (including diabetes mellitus)
Kidney disorders
Liver disorders
Metabolic disorders
Compromised immune system (including patients receiving immunosuppressant therapy, or those with cancer or human immunodeficiency virus [HIV] infection)
Morbid obesity (body mass index [BMI] ≥ 40)
Patients unable to swallow tablets or capsules.
Patients who have previously received Baloxavir Marboxil.
Patients weighing < 40 kg
Patients who have been exposed to an investigational drug within 30 days prior to the predose examinations.
Women who are breastfeeding or have a positive pregnancy test in the predose examinations. The following female patients who have documentation of either a or b below do not need to undergo a pregnancy test in the predose examinations:
Postmenopausal (defined as cessation of regular menstrual periods for 2 years or more and confirmed by a follicle-stimulating hormone test) women
Women who are surgically sterile by hysterectomy, bilateral oophorectomy, or tubal ligation
Patients with concurrent infections requiring systemic antimicrobial and/or antiviral therapy at the predose examinations.
Patients who have received peramivir, laninamivir, oseltamivir, zanamivir, rimantadine, umifenovir, or amantadine within 30 days prior to the predose examinations.
Patients who have received an investigational monoclonal antibody for a viral disease in the last year.
Patients with severe underlying diseases.
Patients with known creatinine clearance ≤ 60 mL/min.
Patients who, in the opinion of the investigator, would be unlikely to comply with required study visits, self-assessments, and interventions
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Clinical Support Help Line Shionogi Clinical Trials Administrator
Organizational Affiliation
Shionogi
Official's Role
Study Director
12. IPD Sharing Statement
Citations:
PubMed Identifier
30184455
Citation
Hayden FG, Sugaya N, Hirotsu N, Lee N, de Jong MD, Hurt AC, Ishida T, Sekino H, Yamada K, Portsmouth S, Kawaguchi K, Shishido T, Arai M, Tsuchiya K, Uehara T, Watanabe A; Baloxavir Marboxil Investigators Group. Baloxavir Marboxil for Uncomplicated Influenza in Adults and Adolescents. N Engl J Med. 2018 Sep 6;379(10):913-923. doi: 10.1056/NEJMoa1716197.
Results Reference
result
PubMed Identifier
35585696
Citation
Retout S, De Buck S, Jolivet S, Duval V, Cosson V. A Pharmacokinetics-Time to Alleviation of Symptoms Model to Support Extrapolation of Baloxavir Marboxil Clinical Efficacy in Different Ethnic Groups with Influenza A or B. Clin Pharmacol Ther. 2022 Aug;112(2):372-381. doi: 10.1002/cpt.2648. Epub 2022 Jun 10.
Results Reference
derived
PubMed Identifier
31309975
Citation
Uehara T, Hayden FG, Kawaguchi K, Omoto S, Hurt AC, De Jong MD, Hirotsu N, Sugaya N, Lee N, Baba K, Shishido T, Tsuchiya K, Portsmouth S, Kida H. Treatment-Emergent Influenza Variant Viruses With Reduced Baloxavir Susceptibility: Impact on Clinical and Virologic Outcomes in Uncomplicated Influenza. J Infect Dis. 2020 Jan 14;221(3):346-355. doi: 10.1093/infdis/jiz244.
Results Reference
derived
Learn more about this trial
A Study of S-033188 (Baloxavir Marboxil) Compared With Placebo or Oseltamivir in Otherwise Healthy Patients With Influenza
We'll reach out to this number within 24 hrs