The invention is directed to a method of increasing the bioavailability of the active form of S-[2-([[1-(2-ethylbutyl)cyclohexyl]carbonyl]amino)phenyl]2-methylpropanet- hioate by administration of a therapeutically effective amount of the drug with food. The invention also provides a kit comprising a pharmaceutical composition comprising a therapeutically effective amount of S-[2-([[1-(2-ethylbutyl)cyclohexyl]carbonyl]amino)phenyl]2-methylpropanet- hioate and a pharmaceutically acceptable carrier, prescribing information, and a container, wherein the prescribing information includes advice to a patient regarding administration of the drug with food to improve bioavailability.