Reduction in the local tissue toxicity of chlorpromazine by .BETA.-cyclodextrin complexation.

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Abstract
Effect of beta-cyclodextrin (beta-CyD) on the local tissue toxicity of chlorpromazine (CPZ) was investigated following the intramuscular injection to rabbits. From the gross and histological examinations, beta-CyD was found to alleviate the muscular tissue damage produced by CPZ on M. vastus lateralis in rabbits. The protective effect of beta-CyD may be ascribed to the decrease in affinity of CPZ to the tissue membrane through inclusion complexation. The present data suggest that beta-CyD complexation is particularly useful to reduce the local toxicity of phenothiazine neuroleptics without altering the pharmacological efficacy.

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