The effects of particle size and food on the absolute bioavailability of U-78875 in dogs after oral administration of either a suspension or tablet dosage form were investigated. A reduction of particle size caused a significant increase in bioavailability along with an increase in dissolution rate. Additionally, both suspension and tablet dosage forms administered after food caused an increase in bioavailability. Thus, to accelerate drug dissolution, a reduction of U-78875 particle size from the unmilled state is important for the optimization of formulation compositions. To increase the bioavailability of U-78875, postprandial dosing should be considered.
I "U-7887 5,3-(5-cyclopropyl-1,2,4-oxadiazol-3 -yl) -5 -( 1 -methylthyl)imidazo[l,5-alquinoxalin-4(5H)-one, is an anxiolytic agent. Solubility of 2679
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