Pharmacokinetic characteristics of
galantamine is absorbed quickly and completely. The bioavailability of the drug when administered orally approximately 90%. Food does not affect the area under the curve (AUC), but the maximum concentration (Cmax) decreased by 25% and the time to reach peak concentration (Tmax) was delayed by 1.5 hours. The drug reaches peak concentration 1 hour after taking
galantamine associated with low plasma proteins, about 18%. The average volume of distribution is 175 liters of drugs
metabolized by the liver galantamine cytochrome P450 through (mainly due to 2D6 and 3A4 isoenzym) and conjugated glucoronic.
Approximately 20% of galantamine kidney excreted unchanged within 24 hours in people with normal kidney function (renal clearance denotes 65ml / min), approximately 20-25% of total plasma clearance was 300ml / min. Half-life of galantamine is 5-7 hours.
Hepatic impairment: In patients with moderate hepatic impairment, after taking one dose of galantamine, galantamine clearance is decreased approximately 25% compared to normal.
Renal impairment: Following a single dose of 8mg 1 , AUC increased approximately 37% in moderate renal insufficiency and 67% in people with severe renal impairment compared to normal people.
elderly: galantamine concentrations higher than 30 to 40% of healthy people
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