J. ROBERT POWELL, PHARM. D.
POWELL JR. Cimetidine and Lidocaine. Ann Intern Med. 1983;99:279. doi: 10.7326/0003-4819-99-2-279_1
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Published: Ann Intern Med. 1983;99(2):279.
To the editor: Knapp and associates (1) indicate Cimetidine causes lidocaine serum concentrations to rise 75% in patients receiving a lidocaine infusion. They report that this results in an increased incidence of lidocaine toxicity and suggest Cimetidine decreases lidocaine clearance by decreasing hepatic blood flow. There are several limitations to this study that do not allow me to accept these conclusions with confidence.
Lidocaine serum concentrations are known to rise on chronic infusion due to a time-dependent decrease in lidocaine clearance of free drug and total drug in plasma, which may independently account for a 15% and 50% rise in
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