We assessed hemisphere function in right-handed male chronic, disorganized type schizophrenic patients (N = 60, age range 18–45 years) using the Quality Extinction Test (QET), in comparison to 20 right-handed male healthy controls in the same age range. The QET analysis discriminated between the disorganized schizophrenic patients and the controls. QET results indicated that chronic schizophrenic patients were less sensitive to tactile stimuli in both hands as compared to controls. Furthermore, the sensitivity to tactile stimuli of the left hand was less than that of the right hand in the schizophrenic patients. In contrast, in the normal controls the sensitivity was similar in both hands. These results indicate possible right hemisphere dysfunction together with disturbance in interhemispheric transmission through the corpus callosum in chronic, disorganized type schizophrenic patients.

Risperidone (Risperdal®) is a recently developed antipsychotic drug with the combination of serotonin-5HT2A-and dopamine-D2-antagonism (SDA). In patients with schizophrenia, risperidone reduces positive symptoms at least equally effective as haloperidol, however, risperidone has a reduced propensity for the induction of extrapyramidal symptoms.

In addition, available evidence indicates that risperidone may be an effective treatment for negative symptoms. The optimum daily dose range is between 4 and 8 mgfor most patients. In this review article, risperidone is compared with some other (classical and atypical) neuroleptics. In addition, the pharmacological and pharmacokinetic properties of risperidone are reviewed.

The study aimed to investigate why patients suffering from chronic schizophrenia discontinue psychological therapy. Patients who dropped out of a randomized controlled trial of cognitive-behaviour therapy and supportive counselling in the treatment of persistent positive psychotic symptoms were asked to complete a questionnaire on their reasons for doing so. Nine out of 12 patients who dropped out completed the questionnaire which consisted of 22 items that could be rated true or false. Although the size of the sample was small, the response rate was acceptable at 75%. The median number of reasons given was 7 (range 3 to 12), with the most common reason being that therapy was not perceived as suitable for the individual’s particular problems. The characteristics of the patients who dropped out are described.

Clozapine was substituted for standard antipsychotic drugs in the treatment of 24 chronic schizophrenic inpatients and the response assessed after a mean of ten months. The majority (71%) improved (33.3% markedly), on their previous level of functioning. The response was better in those under 40 years of age, but neither duration of illness nor previous neuroleptic dose appeared to predict response to clozapine. The drug was ultimately discontinued in five (21%) patients – in three because of non-response and intolerance of sedation and in two because of neutropenia.

Dexamethasone suppresson test (DST) was administered to 26 chronic schizophrenic inpatients who were on stable doses of neuroleptics for over 3 months. Clinical assessments were made on the Brief Psychiatric Rating Scale (BPRS), the Manchester Scale (KGV) and the Scale for the Assessment of Negative Symptoms (SANS). Patients’ neuroleptic treatment was then stopped for 4 weeks and the clinical assessements and the DST repeated. Thirty two percent of the patients showed DST non-suppression which was mostly stable over the 4-week period of the study and was unaffected by the neuroleptic treatment. Contrary to some reports in the literature, the clinical rating scores (including those for depression and negative symptoms), in our patients, showed no relationship with the DST status. We suggest that the DST abnormality in chronic schizophrenies may result from two quite different mechanisms: one due to stress assoeiated with transient psychopathology such as agitation, anxiety, depression or psychotic perturbation which is transient, the other resulting from structural abnormalities in the brain and which remains stable over time.