Clozapine is a member of the dibenazepine class of antipsychotic drugs and has been designated an atypical antipsychotic drug. Clinical studies have shown that clozapine is effective in ameliorating the core symptoms, as well as the negative symptoms, in severe psychotic disorders and is therapeutically effective in treating about 30% of schizophrenic patients who are resistant to standard antipsychotic drugs.

The goal is to review pharmacology, efficacy, and clinical use of clozapine, such as its side effects, and the benefit-to-risk ratio of this antipsychotic drug.

Non-systematic literature review based on scientific databases such as PubMed, using key words such as “clozapine”, “efficacy”, “side effects” and “resistant schizophrenia”.

Clozapine was developed as the first atypical antipsychotic with activity for both the negative and positive symptoms of schizophrenia. The primary indications for clozapine are treatment-resistant psychotic disorder, defined as persistent moderate to severe delusions or hallucinations despite two or more clinical trials with other antipsychotic drugs, and patients who are at high risk for suicide. Concerns over a number of safety considerations are responsible for much of the underutilization of clozapine, such as agranulocytosis, metabolic side effects and myocarditis. These side effects can be detected, prevented, minimized and treated, but there will be a very small number of fatalities.

Awareness of the benefits and risks of clozapine is essential for increasing the use of this lifesaving agent.

No significant relationships.

One of the usual indications for Electroconvulsive Therapy (ECT) is Paranoid Schizophrenia (PS), being performed usually in cases resistant to antipsychotics.

To present a clinical case of a patient with antipsychotic-resistant PS, including Clozapine, who received ECT.

We present the case of a 47-year-old patient with an 8-years diagnosis of PS. He presented visual, auditory, and kinesthetic hallucinations, delusions, and thought insertion and diffusion phenomena that impeded concentration. He had received treatment with different antipsychotics (including Clozapine), without achieving remission of symptoms. He also presented significant adverse effects such as hypersalivation and extrapyramidal symptoms. Due to the poor response and the adverse effects that limited the dose increase, it was decided to start ECT.

The patient received a total of 9 sessions, presenting a significant reduction in symptoms since the 5th session (disappearance of the sensory-perceptual alterations and thought disturbances). As side effects, the patient presented amnesia of the moments prior to applying the therapy, which subsequently resolved. The patient continued to present concentration difficulties, although after ECT he denied the presence of thought insertion or diffusion phenomena to which he previously attributed the cause of these difficulties.

Although less responsive than in other indications, ECT combined with antipsychotic drugs has been proven to be more effective than monotherapy (regardless of whether it’s Clozapine or another). This lower response could be due to the use of ECT in the most resistant cases, since it has been demostrated that in more acute cases a faster improvement occurs when the two treatments are combined.

No significant relationships.