Oxcarbazepine compositions of enhanced bioavailability are described that contain oxcarbazepine with at least one solubility-enhancing polymer. Described methods to produce the bioenhanced products include solvent spray drying. One aspect of the method includes the steps of providing a mixture comprising oxcarbazepine, a solubility-enhancing polymer and a single solvent, a solvent blend or solvent/non-solvent blend removing and then evaporating the mixture to form amorphous oxcarbazepine.