Twenty-nine elderly patients who failed treatment with clozapine, risperidone, or olanzapine entered this 24-week, single-center, open-label trial to assess the efficacy of quetiapine (12.5-400 mg/day) for psychosis in patients with Parkinson's disease (PD). Psychiatric, motor, and cognitive assessments were administered at baseline and at periodic intervals for 24 weeks. These included the Brief Psychiatric Rating Scale (BPRS), Neuropsychiatric Inventory (NPI), Unified Parkinson's Disease Rating Scale (UPDRS) and tests of intellectual functioning, attention, and memory. Repeated measures statistical analysis was used to assess change from baseline. The results revealed significant improvements in the 24-week BPRS total score and NPI psychosis subscale scores, with no decline in UPDRS total or motor subscale scores. There was also significant improvement in recall scores on cognitive measures. These results indicate that quetiapine may treat psychotic symptoms and improve cognition without worsening motor function in patients with PD, suggesting that quetiapine is an effective and well-tolerated antipsychotic in this population.

Short-term treatment with both quetiapine and risperidone resulted in improvements in social competence, with these improvements associated with improvements on some of the neuropsychological measures. In addition to their clinical importance, these results support the use of performance-based competence assessments as outcome measures in clinical trials.

Quetiapine is a novel, atypical antipsychotic agent that has been shown to provide long-term efficacy without serious adverse effects in adults. This is the first study of the extended use of quetiapine in adolescents. Five boys and 5 girls, ages 12.3 to 15.9 years, with diagnoses of schizoaffective disorder (n = 7) or bipolar disorder with psychotic features (n = 3) were eligible for entry into this single-site, 88-week, open-label trial. Subjects had completed a pharmacokinetic study over 23 days, during which the dosage of quetiapine was increased sequentially from 25 mg bid to a maximum of 400 mg bid (800 mg/day) (McConville et al. 2000). In the open-label extension of this trial, which followed directly after this trial, a physician's choice design allowed for flexible dose titration of quetiapine by the study physician to an optimal dose for each patient, with ending doses ranging from 300 mg/day to 800 mg/day. Concomitant medications, especially for anxiety and/or manic symptoms, were allowed as deemed necessary. Tolerability and safety were assessed using clinical laboratory tests, physical examinations, measurements of vital signs, interviews for selective symptomatology, and electrocardiograms. Psychiatric measurements included the 18-item Brief Psychiatric Rating Scale (BPRS), the Clinical Global Impression (CGI) scale, and the modified Scale for the Assessment of Negative Symptoms (SANS). Neurologic symptom ratings included the Simpson-Angus Scale and the Abnormal Involuntary Movement Scale. Mean BPRS, CGI, and SANS scores improved significantly during the trial (p < 0.05). No extrapyramidal symptoms or evidence of tardive dyskinesia was seen. Clinically, there was a nonsignificant increase in mean weight and body mass index at week 64. This long-term study suggests that quetiapine is a well-tolerated antipsychotic agent that is efficacious for the treatment of symptoms of selected psychotic disorders in adolescents.

This study evaluated the clinical efficacy and safety of a new triazolobenzodiazepine, adinazolam, and imipramine in 40 patients with carefully diagnosed major depressive disorder. Overall, adinazolam was found to be as effective as imipramine. In addition, when patients with more severe, melancholic, subtype of depression were examined, adinazolam was also as effective as imipramine. With the exception of sedation, adinazolam patients demonstrated fewer overall adverse events than imipramine subjects. These results suggest that adinazolam may represent an interesting antidepressant compound.

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