Prednisone is a type of prescription steroid medication. It is available in many forms, including a liquid, a delayed-release tablet, and an immediate-release tablet. Patients would take all of those forms orally. The delayed-release tablet of prednisone is sold as the brand name Rayos and a generic drug, which tends to be more affordable. On the other hand, the immediate-release tablet form is available only as a generic drug. In some cases, you might not find brand-name medications in all forms and strengths.