The extent of exposure (AUC0-∞) with once-daily dosing of 100 mg of flibanserin was increased 1.4-fold as compared to a single dose.
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After a single oral solution dose of 50 mg 14C-radiolabeled flibanserin , 44% of the total 14C-flibanserin related radioactivity was recovered in urine, and 51% was recovered in feces. Flibanserin is extensively metabolized to at least 35 metabolites, most of them occurring in low concentrations in plasma. Two metabolites could be characterized that showed plasma concentrations similar to that achieved with flibanserin: 6,21-dihydroxy-flibanserin-6,21-disulfate and 6-hydroxy¬flibanserin-6-sulfate. These two metabolites are inactive.