Conditions: Schizophrenia
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 518
Healthy volunteers: no

Brief summary:
The objective of the study is to investigate the efficacy, safety and tolerability of four different doses of BI 409306 once daily compared to placebo given for 12 weeks in patients with schizophrenia on stable antipsychotic treatment.

Detailed description:

Arms:
arm 1: None arm 2: None arm 3: None arm 4: None arm 5: None

Interventions: intervention 1: BI 409306 100 mg QD intervention 2: BI 498306 50 mg QD intervention 3: Placebo intervention 4: BI 498306 25 mg QD intervention 5: BI 409306 10 mg QD
Intervention descriptions: intervention 1: None intervention 2: None intervention 3: None intervention 4: None intervention 5: None

Protocol document: