Dược Động Học :
▧ Absorption :
Bezitramide has poor water solubility, thus administration is restricted to the oral route. [1]
▧ Metabolism :
Bezitramide is a prodrug which undergoes rapid hydrolysis of a proprionyl-group to form the major metabolite, R-4618. R-4618 has analgesic properties similar to the parent compound.[1] Metabolism occurs in the gastrointestinal tract under both acidic and alkaline conditions [1].
▧ Route of Elimination :
Less than 0.3% of the dose was excreted unchanged in the urine. High concentrations in feces suggested incomplete absorption of biliary excretion.
Experiments in rats demonstrated extensive (up to 70%) biliary excretion, and less than 3% urinary excretion. [1]
▧ Half Life :
11-24h. [1]