Refractory Schizophrenia Clinical Trial
Official title:
Pilot Double Blind, Placebo Controlled and Randomized Study to Assess Electroconvulsive Therapy Efficacy as Augmenting Strategy to Clozapine in Super-refractory Schizophrenia
Introduction: In spite of recent advances in schizophrenia treatment, 30% of patients still
do not respond properly to antipsychotic therapy. These patients are considered
treatment-resistant or refractory, and the best choice for them is clozapine. However, even
supported by the literature as the best known antipsychotic in terms of efficacy and rates
of response, a considerable number of patients will still not respond to this treatment,
remaining symptomatic and dysfunctional. These patients are classified as super-refractory
(clozapine-resistent). In these cases, augmenting strategies are necessary, and some have
been in use: typical and atypical antipsychotics, mood stabilizers, antidepressants and
electroconvulsive therapy (ECT). Some studies have favored ECT, but no definitive conclusion
has been drawn.
Objective: Test the electroconvulsive therapy efficacy and safety as augmenting strategy to
clozapine-resistant patients, as compared to placebo (sham ECT).
Methods: This is a pilot double blind, placebo controlled and randomized study to assess
electroconvulsive therapy efficacy as augmenting strategy to clozapine in super-refractory
schizophrenia. The ECT treatment will be delivered with either a MECTA SPECTRUM 5000Q or
4000Q device, and the procedure is under general anesthesia and monitorization, after
informed consent. The Hospital will follow national protocols and regulations on ECT. Sham
ECT consists in habitual patient preparation and sedation, without stimulation. Patients
that fit inclusion criteria will have their clozapine blood levels dosed and undergo
structured assessments at baseline, after 6 treatments and at the end of the cycle of 12 ECT
sessions (thrice a week protocol). The assessments will be based on CGI (Clinical Global
Impression) and PANSS (Positive and Negative Syndrome Scale) scales. All medication will be
maintained, except lithium carbonate.
n/a
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Outcomes Assessor), Primary Purpose: Treatment
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