Extended release formulations of 3-fluoro-2-pyridylmethyl-3-(2,2-difluoro-2-(2-pyridyl)ethylamino)-6-chloropyrazin-2-one-1-acetamide (DPOC-4088) that provide for better control of blood plasma levels. The extended release formulations maintain substantially constant plasma levels of the active ingredient for at least about 16 hours and provide for once-daily dosing.