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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Local anesthetic activity and disopyramide toxicity.

In the isolated frog sciatic nerve preparation, IC50 concentrations for nerve block were 0.34 +/- 0.9 mM for lidocaine (LIDO), 0.62 +/- 0.11 mM for procaine, 11.9 +/- 6.1 mM for disopyramide (DIP), and 52.8 +/- 24 mM for MIP (the mono-demethylated metabolite of DIP). In contrast to the LIDO block, DIP-induced nerve block was irreversible. DIP-induced depression of the electrically stimulated rat ventricular strip was completely reversed by washing the drug-free Tyrode's solution. In mice receiving 250 mg/kg DIP, neither convulsions nor death could be prevented by diazepam or other anticonvulsants. These results suggest that DIP has a very weak local anesthetic action which does not contribute significantly to disopyramide toxicity.[1]

References

  1. Local anesthetic activity and disopyramide toxicity. Malavé, A., Holsapple, M.P., Yim, G.K. Archives internationales de pharmacodynamie et de thérapie. (1983) [Pubmed]
 
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