Single-dose and multiple-dose pharmacokinetics of etintidine in healthy volunteers.

The present study was designed to determine the single- and multiple-dose pharmacokinetic profiles of the H2 receptor antagonist etintidine in healthy volunteers. Etintidine was rapidly absorbed and eliminated after the oral administration of 300 mg base equivalent of etintidine HCl in a capsule formulation to 11 healthy subjects. Comparison of the pharmacokinetics after a single dose and during steady state showed no significant differences (p greater than 0.05) in the mean values of Cmax, tmax, oral clearance, elimination rate constant, and renal clearance, indicating no significant accumulation of etintidine and no apparent time-dependent changes in the pharmacokinetics of etintidine during multiple dose administration.