Trial Outcomes & Findings for Dose-Finding Study of Favipiravir in the Treatment of Uncomplicated Influenza (NCT NCT01068912)

NCT ID: NCT01068912

Last Updated: 2015-11-18

Results Overview

Overall time required from first study drug administration to alleviation of the 6 primary influenza symptoms and for temperature (oral) measurements to be less than 38.0°C for patients aged 20 to less than 65 years and less than 37.8°C for patients aged 65 years or older. "Alleviated" was defined as all 6 symptom scores had to be decreased to 1 or below and the decrease remain unchanged for 21.5 hours.

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

530 participants

Primary outcome timeframe

22 weeks

Results posted on

2015-11-18

Participant Flow

Participant milestones

Participant milestones
Measure
1: Low Dose Favipiravir
Favipiravir: 1000 mg favipiravir BID x 1 day, and 400 mg favipiravir BID x 4 days
2: High Dose Favipiravir
Favipiravir: 1200 mg favipiravir BID x 1 day, and 800 mg favipiravir BID x 4 days
Placebo
Placebo comparator: Placebo BID x 1 day, and Placebo BID x 4 days
Overall Study
STARTED
134
195
201
Overall Study
COMPLETED
123
173
186
Overall Study
NOT COMPLETED
11
22
15

Reasons for withdrawal

Reasons for withdrawal
Measure
1: Low Dose Favipiravir
Favipiravir: 1000 mg favipiravir BID x 1 day, and 400 mg favipiravir BID x 4 days
2: High Dose Favipiravir
Favipiravir: 1200 mg favipiravir BID x 1 day, and 800 mg favipiravir BID x 4 days
Placebo
Placebo comparator: Placebo BID x 1 day, and Placebo BID x 4 days
Overall Study
Adverse Event
2
3
2
Overall Study
Withdrawal by Subject
5
6
6
Overall Study
Lost to Follow-up
3
7
3
Overall Study
Protocol Violation
0
2
0
Overall Study
aggravation influenza
1
1
1
Overall Study
other underlying illness
0
3
3

Baseline Characteristics

Dose-Finding Study of Favipiravir in the Treatment of Uncomplicated Influenza

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
1: Low Dose Favipiravir
n=132 Participants
Favipiravir: 1000 mg favipiravir BID x 1 day, and 400 mg favipiravir BID x 4 days
2: High Dose Favipiravir
n=189 Participants
Favipiravir: 1200 mg favipiravir BID x 1 day, and 800 mg favipiravir BID x 4 days
Placebo
n=197 Participants
Placebo comparator: Placebo BID x 1 day, and Placebo BID x 4 days
Total
n=518 Participants
Total of all reporting groups
Age, Continuous
42.2 years
n=5 Participants
42.6 years
n=7 Participants
42.7 years
n=5 Participants
42.5 years
n=4 Participants
Sex: Female, Male
Female
73 Participants
n=5 Participants
102 Participants
n=7 Participants
109 Participants
n=5 Participants
284 Participants
n=4 Participants
Sex: Female, Male
Male
59 Participants
n=5 Participants
87 Participants
n=7 Participants
88 Participants
n=5 Participants
234 Participants
n=4 Participants
Race/Ethnicity, Customized
Asian
3 participants
n=5 Participants
7 participants
n=7 Participants
4 participants
n=5 Participants
14 participants
n=4 Participants
Race/Ethnicity, Customized
Black or African American
17 participants
n=5 Participants
22 participants
n=7 Participants
23 participants
n=5 Participants
62 participants
n=4 Participants
Race/Ethnicity, Customized
Hispanic or Latino
15 participants
n=5 Participants
25 participants
n=7 Participants
29 participants
n=5 Participants
69 participants
n=4 Participants
Race/Ethnicity, Customized
Mestizo
14 participants
n=5 Participants
20 participants
n=7 Participants
17 participants
n=5 Participants
51 participants
n=4 Participants
Race/Ethnicity, Customized
Native Hawaiian or other Pacific Islander
2 participants
n=5 Participants
2 participants
n=7 Participants
1 participants
n=5 Participants
5 participants
n=4 Participants
Race/Ethnicity, Customized
White
72 participants
n=5 Participants
103 participants
n=7 Participants
115 participants
n=5 Participants
290 participants
n=4 Participants
Race/Ethnicity, Customized
Other
7 participants
n=5 Participants
7 participants
n=7 Participants
6 participants
n=5 Participants
20 participants
n=4 Participants
Race/Ethnicity, Customized
More than one race, including Hispanic or Latino
0 participants
n=5 Participants
3 participants
n=7 Participants
2 participants
n=5 Participants
5 participants
n=4 Participants
Race/Ethnicity, Customized
More than one race, excluding Hispanic or Latino
2 participants
n=5 Participants
0 participants
n=7 Participants
0 participants
n=5 Participants
2 participants
n=4 Participants
Region of Enrollment
United States
85 participants
n=5 Participants
120 participants
n=7 Participants
128 participants
n=5 Participants
333 participants
n=4 Participants
Region of Enrollment
Peru
24 participants
n=5 Participants
36 participants
n=7 Participants
36 participants
n=5 Participants
96 participants
n=4 Participants
Region of Enrollment
Australia
7 participants
n=5 Participants
9 participants
n=7 Participants
8 participants
n=5 Participants
24 participants
n=4 Participants
Region of Enrollment
South Africa
8 participants
n=5 Participants
10 participants
n=7 Participants
8 participants
n=5 Participants
26 participants
n=4 Participants
Region of Enrollment
Chile
2 participants
n=5 Participants
9 participants
n=7 Participants
7 participants
n=5 Participants
18 participants
n=4 Participants
Region of Enrollment
New Zealand
6 participants
n=5 Participants
5 participants
n=7 Participants
10 participants
n=5 Participants
21 participants
n=4 Participants
Rapid Antigen Test Result
Type A Positive
77 participants
n=5 Participants
113 participants
n=7 Participants
124 participants
n=5 Participants
314 participants
n=4 Participants
Rapid Antigen Test Result
Type B positive
30 participants
n=5 Participants
45 participants
n=7 Participants
43 participants
n=5 Participants
118 participants
n=4 Participants
Rapid Antigen Test Result
Type A and B positive
6 participants
n=5 Participants
5 participants
n=7 Participants
2 participants
n=5 Participants
13 participants
n=4 Participants
Rapid Antigen Test Result
Influenza negative
19 participants
n=5 Participants
26 participants
n=7 Participants
28 participants
n=5 Participants
73 participants
n=4 Participants
Virus type identification
A (H1N1) pdm
39 participants
n=5 Participants
32 participants
n=7 Participants
39 participants
n=5 Participants
110 participants
n=4 Participants
Virus type identification
A (H3N2)
29 participants
n=5 Participants
67 participants
n=7 Participants
66 participants
n=5 Participants
162 participants
n=4 Participants
Virus type identification
B
20 participants
n=5 Participants
23 participants
n=7 Participants
20 participants
n=5 Participants
63 participants
n=4 Participants
Virus type identification
Other
1 participants
n=5 Participants
0 participants
n=7 Participants
0 participants
n=5 Participants
1 participants
n=4 Participants
Virus type identification
Neither
43 participants
n=5 Participants
67 participants
n=7 Participants
72 participants
n=5 Participants
182 participants
n=4 Participants

PRIMARY outcome

Timeframe: 22 weeks

Population: The primary analysis population for efficacy analyses was the ITTI Population (N=333), defined as all patients who received at least 1 dose of study drug with any available efficacy data after randomization and who tested positive for influenza A or B by PCR assay or culture tests on Day 1 using determinations.

Overall time required from first study drug administration to alleviation of the 6 primary influenza symptoms and for temperature (oral) measurements to be less than 38.0°C for patients aged 20 to less than 65 years and less than 37.8°C for patients aged 65 years or older. "Alleviated" was defined as all 6 symptom scores had to be decreased to 1 or below and the decrease remain unchanged for 21.5 hours.

Outcome measures

Outcome measures
Measure
1: Low Dose Favipiravir
n=88 Participants
Favipiravir: 1000 mg favipiravir BID x 1 day, and 400 mg favipiravir BID x 4 days
2: High Dose Favipiravir
n=121 Participants
Favipiravir:1200 mg favipiravir BID x 1 day, and 800 mg favipiravir BID x 4 days
Placebo
n=124 Participants
Placebo comparator: Placebo BID x 1 day, and Placebo BID x 4 days
Clinical Efficacy of 2 Dose Regimens of Favipiravir Compared With Placebo in Treating Patients With Influenza
100.4 hours
Interval 82.4 to 119.8
86.5 hours
Interval 79.2 to 102.1
91.9 hours
Interval 70.3 to 105.4

Adverse Events

1: Low Dose Favipiravir

Serious events: 2 serious events
Other events: 47 other events
Deaths: 0 deaths

2: High Dose Favipiravir

Serious events: 0 serious events
Other events: 65 other events
Deaths: 0 deaths

Placebo

Serious events: 1 serious events
Other events: 79 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
1: Low Dose Favipiravir
n=132 participants at risk
Favipiravir: 1000 mg favipiravir BID x 1 day, and 400 mg favipiravir BID x 4 days
2: High Dose Favipiravir
n=189 participants at risk
Favipiravir: 1200 mg favipiravir BID x 1 day, and 800 mg favipiravir BID x 4 days
Placebo
n=197 participants at risk
Placebo comparator: Placebo BID x 1 day, and Placebo BID x 4 days
Infections and infestations
Vulval abscess
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Nervous system disorders
hepatic encephalopathy
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Respiratory, thoracic and mediastinal disorders
bronchial obstruction
0.00%
0/132
0.00%
0/189
0.51%
1/197 • Number of events 1

Other adverse events

Other adverse events
Measure
1: Low Dose Favipiravir
n=132 participants at risk
Favipiravir: 1000 mg favipiravir BID x 1 day, and 400 mg favipiravir BID x 4 days
2: High Dose Favipiravir
n=189 participants at risk
Favipiravir: 1200 mg favipiravir BID x 1 day, and 800 mg favipiravir BID x 4 days
Placebo
n=197 participants at risk
Placebo comparator: Placebo BID x 1 day, and Placebo BID x 4 days
Infections and infestations
bronchitis
0.00%
0/132
2.6%
5/189 • Number of events 5
1.0%
2/197 • Number of events 2
Nervous system disorders
dizziness
1.5%
2/132 • Number of events 2
2.1%
4/189 • Number of events 4
3.0%
6/197 • Number of events 6
Nervous system disorders
headache
2.3%
3/132 • Number of events 3
2.1%
4/189 • Number of events 4
4.6%
9/197 • Number of events 9
Respiratory, thoracic and mediastinal disorders
cough
2.3%
3/132 • Number of events 3
1.1%
2/189 • Number of events 2
1.0%
2/197 • Number of events 2
Gastrointestinal disorders
diarrhoea
2.3%
3/132 • Number of events 3
4.8%
9/189 • Number of events 9
5.1%
10/197 • Number of events 10
Gastrointestinal disorders
nausea
1.5%
2/132 • Number of events 2
2.1%
4/189 • Number of events 4
4.6%
9/197 • Number of events 9
Skin and subcutaneous tissue disorders
rash
2.3%
3/132 • Number of events 3
0.00%
0/189
0.00%
0/197
Renal and urinary disorders
proteinuria
0.76%
1/132 • Number of events 1
2.1%
4/189 • Number of events 4
0.51%
1/197 • Number of events 1
Investigations
blood fibrinogen increased
3.0%
4/132 • Number of events 4
1.6%
3/189 • Number of events 3
3.0%
6/197 • Number of events 6
Investigations
blood uric acid increased
2.3%
3/132 • Number of events 3
3.7%
7/189 • Number of events 7
2.5%
5/197 • Number of events 5
Infections and infestations
urinary tract infection
1.5%
2/132 • Number of events 2
0.00%
0/189
2.0%
4/197 • Number of events 4
Gastrointestinal disorders
vomiting
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
2.5%
5/197 • Number of events 5
Investigations
alanine aminotransferase increase
0.00%
0/132
1.6%
3/189 • Number of events 3
3.0%
6/197 • Number of events 6
Investigations
blood triglycerides increased
1.5%
2/132 • Number of events 2
1.1%
2/189 • Number of events 2
2.0%
4/197 • Number of events 4
Investigations
INR increased
0.00%
0/132
0.00%
0/189
2.5%
5/197 • Number of events 5
Infections and infestations
ear infection
1.5%
2/132 • Number of events 2
0.00%
0/189
0.00%
0/197
Nervous system disorders
dysgeusia
1.5%
2/132 • Number of events 2
0.00%
0/189
0.00%
0/197
Cardiac disorders
palpitations
0.00%
0/132
1.6%
3/189 • Number of events 3
0.51%
1/197 • Number of events 1
Respiratory, thoracic and mediastinal disorders
epistaxis
1.5%
2/132 • Number of events 2
0.00%
0/189
0.51%
1/197 • Number of events 1
Respiratory, thoracic and mediastinal disorders
respiratory tract congestion
1.5%
2/132 • Number of events 2
0.53%
1/189 • Number of events 1
0.00%
0/197
Skin and subcutaneous tissue disorders
urticaria
1.5%
2/132 • Number of events 2
0.00%
0/189
0.00%
0/197
Musculoskeletal and connective tissue disorders
musculoskeletal chest pain
0.00%
0/132
0.00%
0/189
1.5%
3/197 • Number of events 3
Renal and urinary disorders
haematuria
0.00%
0/132
0.00%
0/189
1.5%
3/197 • Number of events 3
Investigations
APTT prolonged
0.00%
0/132
0.00%
0/189
1.5%
3/197 • Number of events 3
Investigations
aspartate aminotransferase increased
0.00%
0/132
1.6%
3/189 • Number of events 3
1.5%
3/197 • Number of events 3
Investigations
Blood creatine phosphokinase increased
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
1.5%
3/197 • Number of events 3
Investigations
blood creatinine increased
1.5%
2/132 • Number of events 2
1.1%
2/189 • Number of events 2
0.51%
1/197 • Number of events 1
Gastrointestinal disorders
abdominal pain
0.00%
0/132
1.6%
3/189 • Number of events 3
1.5%
3/197 • Number of events 3
Infections and infestations
upper respiratory tract infection
0.00%
0/132
0.00%
0/189
1.5%
3/197 • Number of events 3
Investigations
WBC decreased
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Investigations
platelet count decreased
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Investigations
neutrophil count increased
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
0.00%
0/197
Investigations
neutrophil count decreased
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
0.00%
0/197
Reproductive system and breast disorders
pelvic pain
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
0.00%
0/197
Reproductive system and breast disorders
breast tenderness
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Renal and urinary disorders
ketonuria
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
1.0%
2/197 • Number of events 2
Musculoskeletal and connective tissue disorders
myalgia
0.00%
0/132
1.1%
2/189 • Number of events 2
0.00%
0/197
Musculoskeletal and connective tissue disorders
muscle spasm
0.00%
0/132
0.53%
1/189 • Number of events 1
1.0%
2/197 • Number of events 2
Musculoskeletal and connective tissue disorders
back pain
0.00%
0/132
1.1%
2/189 • Number of events 2
1.0%
2/197 • Number of events 2
Infections and infestations
rhinitis
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
0.00%
0/197
Infections and infestations
otitis media
0.00%
0/132
0.53%
1/189 • Number of events 1
1.0%
2/197 • Number of events 2
Infections and infestations
sinusitis
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
0.51%
1/197 • Number of events 1
Infections and infestations
tonsillits
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Infections and infestations
viral upper respiratory tract infection
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Infections and infestations
vulval abscess
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Infections and infestations
pharyngitis bacterial
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
0.00%
0/197
Infections and infestations
sinusitis bacterial
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
0.00%
0/197
Blood and lymphatic system disorders
leukopenia
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
1.0%
2/197 • Number of events 2
Metabolism and nutrition disorders
decreased appetite
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
0.00%
0/197
Nervous system disorders
hepatic encephalopathy
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Nervous system disorders
parasthesia
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Nervous system disorders
somnolence
0.00%
0/132
0.00%
0/189
1.0%
2/197 • Number of events 2
Ear and labyrinth disorders
ear pain
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
0.00%
0/197
Ear and labyrinth disorders
tympanic membrane disorder
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Vascular disorders
hypertension
0.76%
1/132 • Number of events 1
0.00%
0/189
0.51%
1/197 • Number of events 1
Respiratory, thoracic and mediastinal disorders
dyspnoea
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Respiratory, thoracic and mediastinal disorders
haemoptysis
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
0.51%
1/197 • Number of events 1
Respiratory, thoracic and mediastinal disorders
pharyngeal erythema
0.76%
1/132 • Number of events 1
0.00%
0/189
0.51%
1/197 • Number of events 1
Gastrointestinal disorders
abdominal distension
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
0.00%
0/197
Gastrointestinal disorders
aphthous stomatitis
0.76%
1/132
0.53%
1/189
0.51%
1/197
Gastrointestinal disorders
constipation
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
0.51%
1/197 • Number of events 1
Gastrointestinal disorders
dry mouth
0.76%
1/132 • Number of events 1
1.1%
2/189 • Number of events 2
1.0%
2/197 • Number of events 2
Gastrointestinal disorders
dyspepsia
0.00%
0/132
0.53%
1/189 • Number of events 1
1.0%
2/197 • Number of events 2
Gastrointestinal disorders
dysphagia
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Gastrointestinal disorders
flatulence
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Gastrointestinal disorders
gastritis
0.76%
1/132 • Number of events 1
0.00%
0/189
1.0%
2/197 • Number of events 2
Gastrointestinal disorders
sensitivity of teeth
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Skin and subcutaneous tissue disorders
pruritis
0.76%
1/132 • Number of events 1
0.53%
1/189 • Number of events 1
0.00%
0/197
Skin and subcutaneous tissue disorders
rash erythematous
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Skin and subcutaneous tissue disorders
hypoaesthesia facial
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Renal and urinary disorders
leukocyturia
0.00%
0/132
0.00%
0/189
1.0%
2/197 • Number of events 2
General disorders
asthenia
0.00%
0/132
1.1%
2/189 • Number of events 2
0.51%
1/197 • Number of events 1
General disorders
pyrexia
0.76%
1/132 • Number of events 1
0.00%
0/189
0.00%
0/197
Investigations
C-reactive protein increased
1.5%
2/132 • Number of events 2
1.1%
2/189 • Number of events 2
1.5%
3/197 • Number of events 3
Investigations
gamma-glutamyl transferase increased
0.00%
0/132
1.6%
3/189 • Number of events 3
1.5%
3/197 • Number of events 3
Investigations
lymphocyte count decreased
1.5%
2/132 • Number of events 2
0.53%
1/189 • Number of events 1
0.00%
0/197
Investigations
blood phosphorus increased
0.00%
0/132
0.00%
0/189
1.0%
2/197 • Number of events 2
Investigations
bilibrubin urine
0.00%
0/132
1.1%
2/189 • Number of events 2
0.00%
0/197
Metabolism and nutrition disorders
hypertriglyceridaemia
0.00%
0/132
0.00%
0/189
1.0%
2/197 • Number of events 2
Investigations
WBC increased
0.00%
0/132
1.1%
2/189 • Number of events 2
0.00%
0/197

Additional Information

Dr. Carol Epstein, Chief Medical Officer

MediVector, Inc., managing member MDVI, LLC

Phone: 617-439-4500

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place

Restriction type: GT60