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- W2050254757 abstract "Nineteen healthy volunteers received a single 0.5-mg oral dose of triazolam on four occasions under the following conditions: (1) triazolam alone; (2) triazolam with cimetidine, 300 mg four times daily; (3) triazolam with propranolol, 40 mg four times daily; (4) triazolam with both cimetidine and propranolol. Triazolam kinetics were determined from multiple plasma concentrations measured during 24 hours after each dose. Compared with control, peak plasma triazolam concentration (Cmax) was significantly increased by cimetidine (5.4 versus 3.9 ng/mL), total area under the plasma concentration curve (AUC) increased (21.3 versus 16.1 ng/mL X hr), and oral clearance decreased (485 versus 668 mL/min). However triazolam half-life was not increased. During propranolol alone, triazolam Cmax (4.1 ng/mL), AUC (14.3 ng/mL X hr), and clearance (759 mL/min) did not differ significantly from control, whereas kinetic variables for triazolam with cimetidine plus propranolol were similar to those with cimetidine alone. Plasma free fraction for triazolam (17 to 18% unbound) did not differ significantly among the four treatment conditions. Mean steady-state plasma cimetidine concentrations during trials 2 and 4 were similar (1.04 versus .98 micrograms/mL), whereas plasma propranolol was significantly higher during cimetidine plus propranolol than with propranolol alone (47 versus 29 ng/ml, P less than .001). Thus cimetidine coadministration significantly inhibits triazolam clearance, causing increased triazolam AUC and Cmax, but without a prolongation in half-life. Propranolol itself does not impair triazolam clearance, nor does propranolol potentiate the inhibitory effect of cimetidine alone." @default.
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- W2050254757 date "1988-03-01" @default.
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- W2050254757 title "Triazolam Kinetics: Interaction with Cimetidine, Propranolol, and the Combination" @default.
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- W2050254757 doi "https://doi.org/10.1002/j.1552-4604.1988.tb03137.x" @default.
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