Absorption Metabolism and Excretion

Amantadine is rapidly and completely absorbed from the gastrointestinal tract, and peak blood levels are achieved in 2 to 5 hours. The serum half-life of amantadine averages 17 hours in young adults and 29 hours in the elderly. Most of the drug (90%) is eliminated unchanged by glomerular filtration and tubular secretion.

Rimantadine is well absorbed following oral administration, with peak blood levels achieved in 5 to 7 hours. Its elimination half-life averages 25 hours in young adults and 32 hours in the elderly. Less than 25% of the dose is excreted in the urine as unchanged drug; the remainder is eliminated as hydroxylated or conjugated metabolites.

Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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