{"id":"perineural-dexamethasone","safety":{"commonSideEffects":[{"rate":null,"effect":"Hyperglycemia"},{"rate":null,"effect":"Local tissue irritation"},{"rate":null,"effect":"Infection risk (with repeated use)"}]},"_chembl":null,"_dailymed":null,"mechanism":{"_ai_source":"claude-haiku-4.5","explanation":"Dexamethasone, a potent glucocorticoid, suppresses local inflammatory responses when deposited in the perineural space around a nerve. This anti-inflammatory action reduces edema and nerve irritation, thereby extending the analgesic duration of local anesthetic blocks. 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