alexa Disposition of atovaquone in humans.


Journal of Clinical & Experimental Ophthalmology

Author(s): Rolan PE, Mercer AJ, Tate E, Benjamin I, Posner J

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Abstract Atovaquone is an antiprotozoal compound with good in vitro stability against metabolic inactivation. Previous human studies which did not involve radiolabelling had not accounted for a substantial proportion of the dose. The possible metabolism of atovaquone in men was examined in a radiolabelling study involving four healthy male volunteers. Radioactivity was eliminated almost exclusively via the feces. All radioactivity in plasma, urine, and feces was accounted for by atovaquone, with no evidence of metabolites. Radiolabelled atovaquone was administered to a patient with an indwelling biliary tube after surgery. Biliary radioactivity was approximately 10- to 40-fold higher than that in plasma and was accounted for by atovaquone. Atovaquone is not significantly metabolized in humans but is excreted into bile against a high concentration gradient.
This article was published in Antimicrob Agents Chemother and referenced in Journal of Clinical & Experimental Ophthalmology

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