{"id":"single-injection-nerve-block","safety":{"commonSideEffects":[{"rate":null,"effect":"Temporary nerve injury or paresthesia"},{"rate":null,"effect":"Hematoma or bruising at injection site"},{"rate":null,"effect":"Local anesthetic toxicity (if systemic absorption occurs)"},{"rate":null,"effect":"Infection at injection site"}]},"_chembl":null,"_dailymed":null,"mechanism":{"_ai_source":"claude-haiku-4.5","explanation":"Nerve blocks work by delivering local anesthetic agents directly around peripheral nerves, blocking the conduction of pain signals from a specific anatomical region. This approach provides targeted anesthesia without systemic effects, allowing for pain control during and after procedures or for chronic pain management. 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