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A phase 2b, multicenter, randomized, double-blind, placebo-controlled, parallel-group study to evaluate the safety, tolerability, and efficacy of S-337395 in symptomatic nonhospitalized adults with respiratory syncytial virus who are at high risk of progression to severe disease

Status
Not yet recruiting
Phases
Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2025-523156-31-00
Acronym
2402T1432
Enrollment
15
Registered
2025-11-18
Start date
Unknown
Completion date
Unknown
Last updated
2025-11-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Respiratory Syncytial Virus

Brief summary

Change from baseline in RSV RNA load by qRT-PCR (nasopharyngeal swab) on visit 2 (day 2), visit 3 (day 4), and visit 4 (day 6)

Detailed description

Assessment of TEAEs, clinical laboratory test results, 12-lead ECGs, physical examination findings, and vital signs measurements, Change from baseline over time in severity of RSV symptoms using RiiQ™: respiratory (RiiQ-RSS), systemic (RiiQ-SSS), and total (RiiQ-RSS + RiiQ-SSS). Time to resolution defined as return to baseline per PSQ. Includes time to first and sustained (2 days) resolution of respiratory, systemic, and combined symptoms, and resolution of each symptom separately, based on RiiQ subscales., Based on RSV virological assay (nasopharyngeal swabs): Change from baseline in RSV RNA load and infectious titer at each time point; AUC through day 6; time to first/sustained negative or , > Plasma concentrations of S-337395 after repeated oral doses of S-337395 > Plasma concentrations of S 337395 12 and 24 hours after the first dose and the last dose (C12 and C24)

Interventions

None listed

Sponsors

Shionogi B.V.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Change from baseline in RSV RNA load by qRT-PCR (nasopharyngeal swab) on visit 2 (day 2), visit 3 (day 4), and visit 4 (day 6)

Secondary

MeasureTime frame
Assessment of TEAEs, clinical laboratory test results, 12-lead ECGs, physical examination findings, and vital signs measurements, Change from baseline over time in severity of RSV symptoms using RiiQ™: respiratory (RiiQ-RSS), systemic (RiiQ-SSS), and total (RiiQ-RSS + RiiQ-SSS). Time to resolution defined as return to baseline per PSQ. Includes time to first and sustained (2 days) resolution of respiratory, systemic, and combined symptoms, and resolution of each symptom separately, based on RiiQ subscales., Based on RSV virological assay (nasopharyngeal swabs): Change from baseline in RSV RNA load and infectious titer at each time point; AUC through day 6; time to first/sustained negative or , > Plasma concentrations of S-337395 after repeated oral doses of S-337395 > Plasma concentrations of S 337395 12 and 24 hours after the first dose and the last dose (C12 and C24)

Countries

Bulgaria

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026