Lidocaine hydrochloride is a local anesthetic because of amides. After blood absorption or intravenous administration, there is obvious excitatory and inhibitory biphasic effect on the central nervous system, and there is no pioneering excitement. When the blood concentration is low, analgesia and lethargy and pain threshold increase; as the dose increases …

Lidocaine hydrochloride is a local anesthetic because of amides. After blood absorption or intravenous administration, there is obvious excitatory and inhibitory biphasic effect on the central nervous system, and there is no pioneering excitement. When the blood concentration is low, analgesia and lethargy and pain threshold increase; as the dose increases …