In Vivo Serotonin 5-HT2A Receptor Occupancy and Quetiapine
Mr. A was a 36-year-old Caucasian man who had previously been treated with haloperidol; he came in for treatment showing marked orofacial dyskinesia. Previously, severe paranoid symptoms had resulted in a 2-year forensic hospital admission after he had been convicted of arson. Mr. A had a Brief Psychiatric Rating Scale score of 24, which did not change with quetiapine treatment. However, his Abnormal Involuntary Movement Scale score decreased from 12 to 4 after 7 weeks of quetiapine treatment.Mr. B was a 21-year-old Caucasian man who had previously been treated with flupentixol decanoate (40 mg, two per week) for 2 years. This treatment was associated with akathisia, which was controlled with anticholinergic therapy. After he started treatment with quetiapine, both he and his parents reported substantial improvements in his social interaction and peer relations. He obtained part-time work for the first time in 2 years. Ratings were performed before his quetiapine treatment began and on the day of the scan. Mr. B’s score on the Scale for the Assessment of Negative Symptoms was 60, which decreased to 23 after treatment with quetiapine. He showed no objective evidence of extrapyramidal symptoms.
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