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A Phase III, 52-week, prospective, randomized, double-blind, placebo-controlled, parallel-group, multi-center study, with a primary efficacy endpoint at 12 weeks, to determine the efficacy, safety, and tolerability of fixed doses of 15 mg bid and 30 mg bid of evenamide as add-on in patients with documented treatment-resistant schizophrenia, which is not adequately controlled by a stable therapeutic dose of the patient’s current antipsychotic medication(s).

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-519836-18-00
Acronym
NW-3509/023/III/2024
Enrollment
135
Registered
2025-08-22
Start date
2025-12-16
Completion date
Unknown
Last updated
2025-11-17

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

Conditions

treatment-resistant schizophrenia (TRS)

Brief summary

Mean changes from baseline to endpoint (Week 12) on the PANSS total score will be compared between the evenamide 30 mg bid and placebo groups using a mixed-effects repeated measures model approach (MMRM), with treatment, region, visit, and treatmentby-visit interaction as fixed effects, and baseline value as covariate, will be used to analyze the mean change from baseline to Week 12 on the PANSS Total Score.

Detailed description

For the key secondary efficacy endpoint, the mean change from baseline on the CGI-S at endpoint (Week 12) will be compared between the evenamide 30 mg bid dose and placebo groups using the same MMRM approach used for the primary efficacy endpoint, with treatment, region, visit, and treatment-by-visit interaction as fixed effects, and baseline value as covariate

Interventions

DRUGThe placebo for NW-3509 drug product contains blended lactose monohydrate (29.50 mg/caps)
DRUGmicrocrystalline cellulose (70.00 mg/caps)
DRUGand magnesium stearate (0.50 mg/caps) filled into hard gelatin capsules.

Sponsors

Newron Pharmaceuticals S.p.A.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Mean changes from baseline to endpoint (Week 12) on the PANSS total score will be compared between the evenamide 30 mg bid and placebo groups using a mixed-effects repeated measures model approach (MMRM), with treatment, region, visit, and treatmentby-visit interaction as fixed effects, and baseline value as covariate, will be used to analyze the mean change from baseline to Week 12 on the PANSS Total Score.

Secondary

MeasureTime frame
For the key secondary efficacy endpoint, the mean change from baseline on the CGI-S at endpoint (Week 12) will be compared between the evenamide 30 mg bid dose and placebo groups using the same MMRM approach used for the primary efficacy endpoint, with treatment, region, visit, and treatment-by-visit interaction as fixed effects, and baseline value as covariate

Countries

Bulgaria, Croatia, Czechia, France, Germany, Hungary, Italy, Poland, Spain

Outcome results

None listed

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