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Abstract
1.The pharmacokinetics of single oral doses of 20 mg lisinopril and 0.25 mg digoxin. given alone and together, have been studied in 12 normal young male volunteers.
2.Peak serum conc of lisinopril occurred at 6 to 8 h and were slightly higher during combined treatment. Subsequent elimination proceeded moderately rapidly in both cases. concn declining to approx. 25% of peak values in 24 h. The AUC of lisinopril was similarly slightly higher during combined treatment.
3.After lisinopril alone, urinary elimination of unchanged lisinopril was 13% dose in 72 h, and after combined therapy was 17% dose.
4.Although there were no statistically significant differences in lisinopril pharmacokinetics during single or combined treatment, serum and urinary parameters suggest that bioavailability may be enhanced slightly during combined treatment.
5.Plasma concentrations of digoxin were slightly lower and urinary excretion slightly higher during combined treatment, the mean renal clearance being 20% higher.