Relative Potencies, Toxicities, Recommended Doses

on 9.2.06 with 0 comments



The LA’s toxic potential is related to its potency. Remember Mepivacaine and Lidocaine specifically, as related to Procaine. Mepivacaine is 2 times as potent as Procaine, and 2 times as toxic. Lidocaine is 4 times as potent as Procaine, and 2 times as toxic.


The maximum adult dose (MRD) is:

400mg Mepivacaine (without vasoconstrictor)

300mg Lidocaine (without vasoconstrictor)

Category: Pharmacology Notes

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