Schizophrenia Clinical Trial
Official title:
The Switch Study - Efficacy of Early Antipsychotic Switch Versus Maintenance in Patients With Schizophrenia Poorly Responding to Two Weeks of Antipsychotic Treatment
The main aim of the trial is to study whether a change of medication in non-responders to a two-weeks antipsychotic drug trial is more effective than continued treatment with the same antipsychotic. Hypothesis: Non-responders who are switched at 2 weeks to another antipsychotic are more frequently in symptomatic remission at week 8 than non-responders who stay on the same antipsychotic
The patients will be randomised to a double-blind 2 week run in phase with fixed doses of
either oral amisulpride 800 mg/day or olanzapine 20mg/day.
Those participants who have not responded to treatment at two weeks (PANSS improvement <25%)
will be randomised to a 6 week double blind flexible dose phase:
1. Experimental intervention: switch to the other antipsychotic (oral olanzapine 5-20mg/d
or oral amisulpride 200-800 mg/d)
2. Control intervention: continuation with the same drug as in the first 2 weeks in
flexible dose ranges as above for another six weeks Those participants who have
responded at week 2 (≥25% PANSS reduction) will continue on the same drug in flexible
dose ranges as above Total duration of intervention per patient: 8 weeks
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Treatment
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