Abstract:Displacement from human plasma proteins of lidocaine by disopyramide was investigated in serum from nine patients receiving lidocaine treatment because of severe ventricular arrhythmias. From each patient disopyramide in concentrations of 5.9 and 14.7 mumol/l was added to three different serum concentrations of lidocaine and the displacement was examined. At a serum concentration of disopyramide of 14.7 mumol/l the percentage of unbound lidocaine increased from 30.4 +/- 0.2 to 36.3 +/- 0.2% (mean +/- S.E.M., P… Show more
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