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  • Title: [Effect of propranolol on lidocaine pharmacokinetics].
    Author: Gawrońska-Szklarz G, Bijoś P, Feszak J, Droździk M, Goertz K, Wójcicki J.
    Journal: Pol Tyg Lek; ; 45(23-24):473-5. PubMed ID: 2277792.
    Abstract:
    The study aimed at investigating an effect of propranolol on lidocaine pharmacokinetic parameters, especially elimination rate and total clearance rate. The study was carried out in 8 rabbits with cross-over technique. The animals were examined twice. Sequence of therapy was established randomly. Some group of the animals were given propranolol and lidocaine first while the remaining animals were given lidocaine alone. Sequence of drugs administration was changed after one week. Propranolol was given in a single dose of 0.05 mg/kg b.w. intravenously. Lidocaine was injected in a single dose of 3 mg/kg b.w. during 5 minutes i.v. after a 30-minute interval. All drugs were injected into ear vein. Blood for assays was collected 8 times within 6 hours after lidocaine administration. TDx system manufactured by Abbott was used for drug concentration assay with immunofluorescence polarization method. One-compartment open model was used for calculations. The results were analysed with Student t-test for pairs. Significant decrease in AUC, marked decrease in distribution volume and total body clearance following lidocaine and propranolol were noted. The study has shown that there is interaction between propranolol and lidocaine leading to a decrease in total body lidocaine clearance.
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