Switching to quetiapine in patients with acute mania who were intolerant to risperidone.

This study evaluated the overall efficacy and tolerability of quetiapine in the treatment of inpatients with acute mania who are intolerant to risperidone in combination with a mood stabilizer. Eighteen patients completed this 3-week trial. The efficacy and tolerability was assessed upon admission, at baseline, and 1 and 3 weeks later. The Young mania rating scale (YMRS) and clinical global impression-severity (CGI-s) scores from the baseline to the endpoint, decreased by 39.8% and 40.0%, respectively. Fifteen (78.9%) and 18 (94.7%) patients exhibited at least a 50% improvement in the YMRS and CGI-s scores by the end of the trial. Measurements taken through the Barnes akathisia rating scale (BARS), the Simpson-Angus rating scale (SARS) and the drug attitude inventory shortened version-10 (DAI-10) also showed significant improvement. This study suggests that quetiapine may hold promise as an alternative regimen that does not worsen the psychopathology, particularly for those vulnerable to the side effects of drugs, including atypical agents such as risperidone, in naturalistic treatment settings.