Last updated: 09/29/2026 09:02:03
An intravenous (IV) zanamivir pharmacokinetics (PK) study in hospitalized neonates and infants with influenza infection
EudraCT ID
Not applicable
EU CT Number
Not applicable
Trial status
Completed
Completed
Trial overview
Official title: An open label, single arm study to evaluate single and multiple dose pharmacokinetics, safety and tolerability, and to explore clinical outcomes of treatment with intravenous (IV) zanamivir in neonates and infants under 6 months of age with confirmed complicated influenza infection
Trial description: Influenza infection is an important public health priority, with seasonal outbreaks and pandemics causing considerable global morbidity and mortality. The PK, pharmacodynamics (PD), safety and efficacy of IV zanamivir have been evaluated in adults, adolescents and infants more than or equal to (>=) 6 months of age with hospitalized influenza in the IV zanamivir global development program. However, antiviral treatment of neonates and infants under 6 months of age hospitalized with influenza infection remains a medical unmet need. Given the immaturity of the immune system at this age, there are no licensed influenza vaccines for children aged less than six months old. As a requirement of the Pediatric Investigation Plan European Union (EU), GlaxoSmithKline (GSK) will be conducting this open-label, multi-center, single arm, post-marketing authorization study to evaluate the PK and collect safety and tolerability information of IV zanamivir in hospitalized neonates and infants under 6 months of age with confirmed complicated influenza infection. The total duration of study participation for each participant will be up to 24 days with a study treatment period up to 10 days and 14 days of post-treatment follow up. However, for a given participant, the initial 5-day treatment course may be extended for up to 5 additional days if clinical symptoms, participant characteristics or virological tests as assessed by the investigator warrant further treatment. DECTOVA is a trademark of GlaxoSmithKline group of companies.
Primary purpose:
Treatment
Trial design:
Single Group Assignment
Masking:
None (Open Label)
Allocation:
Not applicable
Primary outcomes:
Area under the serum concentration-time curve from time zero to 12 hours post-dose (AUC[0-12]) of zanamivir
Timeframe: Day 1 : 30 minutes, 2 hours, 6 hours and 12 hours post-dose
Area under the serum concentration-time curve from time zero to 24 hours post-dose (AUC[0-24]) of zanamivir
Timeframe: Day 1 : 30 minutes, 2 hours, 6 hours, 12 hours and 24 hours post-dose
Maximum observed serum concentration (Cmax) of zanamivir
Timeframe: Day 1 : 30 minutes, 2 hours, 6 hours, 12 hours and 24 hours post-dose; Day 2: 2 hours and 12 hours post-dose; Day 3: Pre-dose; Day 4: Pre-dose
Clearance (CL) of zanamivir
Timeframe: Day 1 : 30 minutes, 2 hours, 6 hours, 12 hours and 24 hours post-dose; Day 2: 2 hours and 12 hours post-dose; Day 3: Pre-dose; Day 4: Pre-dose
Terminal half-life (t1/2) of zanamivir
Timeframe: Day 1 : 30 minutes, 2 hours, 6 hours, 12 hours and 24 hours post-dose; Day 2: 2 hours and 12 hours post-dose; Day 3: Pre-dose; Day 4: Pre-dose
Secondary outcomes:
Number of participants with adverse events (AEs) and serious adverse events (SAEs)
Timeframe: Up to Day 24
Number of Participants with Clinically Significant Findings in Vital Signs
Timeframe: Up to Day 24
Influenza viral load measured by quantitative Reverse Transcription Polymerase Chain Reaction (RT-PCR) at indicated time points
Timeframe: Baseline (Day 1), Day 3, Day 5 and Day 17
Influenza viral load measured by quantitative tissue culture infectious dose 50% (TCID50) assay at indicated time points
Timeframe: Baseline (Day 1) and Day 3
Change from Baseline in influenza viral load measured by quantitative Reverse Transcription Polymerase Chain Reaction (RT-PCR) at indicated time points
Timeframe: Baseline (Day 1), Day 3, Day 5 and Day 17
Change from Baseline in influenza viral load measured by quantitative tissue culture infectious dose 50% (TCID50) assay at indicated time points
Timeframe: Baseline (Day 1) and Day 3
Number of participants with positive phenotype culture
Timeframe: Up to Day 24
Mean 50% Inhibitory Concentration (IC50) for influenza phenotypes for measurement of viral susceptibility to zanamivir
Timeframe: Baseline (Day 1) and Day 3
Number of participants with amino acid mutations in Neuraminidase (NA) and Hemagglutinin (HA) genes of influenza virus
Timeframe: Up to Day 24
Number of participants with treatment-emergent amino acid mutations in the HA and NA genes of influenza viruses
Timeframe: Up to Day 24
Number of participants with resistance associated mutations detected in either HA or NA genes of influenza viruses
Timeframe: Up to Day 24
Number of participants contributed to genotypic and phenotypic data
Timeframe: Up to Day 24
Interventions:
Drug: Zanamivir
Enrollment:
10
Primary completion date:
2026-14-01
Observational study model:
Not applicable
Time perspective:
Not applicable
Clinical publications:
Not applicable
Medical condition
Influenza, Human, Arthralgia
Product
zanamivir
Collaborators
NA
Study date(s)
November 2022 to April 2026
Type
Interventional
Phase
2
Participation criteria
Sex
Female & Male
Age
NA - 6 Months
Accepts healthy volunteers
No
- Neonates and infants who are aged less than 6 months (corrected age) at the time of the informed consent signed by legally acceptable representative (LAR) of minors. Preterm neonates and infants will be eligible for inclusion but must have reached PMA of at least 28 weeks.
- Participants who are hospitalized with influenza infection, confirmed by a positive rapid molecular diagnostic test for influenza, or a local quantitative Reverse transcriptase-polymerase chain reaction (RT-PCR) test and who must have a potential for improvement Participants with negative rapid molecular test result suspected of having influenza can be enrolled following confirmatory testing by quantitative RT-PCR.
- Participants who are known or suspected to be hypersensitive to any component of the study medication.
- Participants with a disease process which is likely to be irreversible.
Inclusion and exclusion criteria
Inclusion criteria:
- Neonates and infants who are aged less than 6 months (corrected age) at the time of the informed consent signed by legally acceptable representative (LAR) of minors. Preterm neonates and infants will be eligible for inclusion but must have reached PMA of at least 28 weeks.
- Participants who are hospitalized with influenza infection, confirmed by a positive rapid molecular diagnostic test for influenza, or a local quantitative Reverse transcriptase-polymerase chain reaction (RT-PCR) test and who must have a potential for improvement Participants with negative rapid molecular test result suspected of having influenza can be enrolled following confirmatory testing by quantitative RT-PCR.
- Participants with a high risk of altered oral drug absorption, represented by multi-organ dysfunction (dysfunction of at least 2 organs, as defined by the treating physician). (applicable only for Netherlands)
- Body weight >=1 kilograms (kg).
- No gender restriction.
- LAR of minors are willing and able to give written informed consent to participate in the study (or included as permitted by local regulatory authorities, Independent Ethics Committees [IECs] or local laws).
Exclusion criteria:
- Participants who are known or suspected to be hypersensitive to any component of the study medication.
- Participants with a disease process which is likely to be irreversible.
- Participants who meet the following criteria at Baseline: 1. Alanine transaminase (ALT) >=3 times upper limit of normal (ULN) with bilirubin >=2 times ULN 2. or isolated bilirubin >=2 times ULN and >50 percent (%) direct bilirubin 3. or ALT >=5 times ULN Inclusion of participants with liver function tests that fall outside these criteria must be discussed and agreed with the medical monitor.
- Current or chronic history of liver disease or known hepatic or biliary abnormalities (with the exception of benign conditions such as Gilbert's syndrome). Inclusion of participants with neonatal hyperbilirubinemia may be considered if appropriately managed according to local guidelines and must be discussed with the medical monitor (Not-applicable for Great Britain).
- Participants who require concurrent therapy with another anti influenza drug.
- Participants who have participated in a study using an investigational drug within 30 days prior to Baseline.
- A child who has been placed under the control or protection of an agency, organization, institution or entity by the courts, the government or a government body, acting in accordance with powers conferred on them by law or regulation.
- The definition of a CiC can include a child cared for by foster parents or living in a care home or institution, provided that the arrangement falls within the definition above. The definition of a CiC does not include a child who is adopted or has an appointed legal guardian.
- Participants undergoing treatment by Extracorporeal membrane oxygenation (ECMO) or hemofiltration.
- Participants who are positive for severe acute respiratory syndrome–related coronavirus-2 (SARS-CoV-2) as determined by a diagnostic test, at screening
Liver function:
Child in care (CiC), as defined below:
Trial location(s)
Location
GSK Investigational Site
Bydgoszcz, Kujawsko-Pomorskie, Poland, 85-168
Status
Terminated/Withdrawn
Location
GSK Investigational Site
London, United Kingdom, SW17 0QT
Status
Terminated/Withdrawn
Study documents
Protocol
Available language(s): English
Statistical analysis plan
Available language(s): English
If you wish to request for full study report, please contact - [email protected]
Results overview
Results posted on ClinicalTrials.gov
Recruitment status
Completed
Actual primary completion date
2026-14-01
Actual study completion date
2026-01-04
Plain language summaries
Summary of results in plain language
Available language(s): English, Spanish, Italian
Additional information about the trial
Additional information
Not applicable
Participate in clinical trial
Access to clinical trial data by researchers
Visit website