A method of increasing the bioavailability, and decreasing the effect of age on the bioavailability, of metaxalone, by administration of an oral dosage form with food is provided, as well as an article of manufacture comprising an oral dosage form of metaxalone in a suitable container and associated with printed labeling which describes the increased bioavailability, and decreased effect of age on bioavailability, of the medication in the container, when taken with food.