The present invention is directed to compositions and to methods comprising a composition comprising a therapeutically effective amount of a pharmaceutically active agent such as (R)-verapamil, a derivative thereof, or a pharmaceutically acceptable salt thereof, wherein the composition treats and/or manages at least one condition having MT1 receptor activity and releases the pharmaceutically active agent, a derivative thereof or a pharmaceutically acceptable salt thereof to exhibit a primary activity on the MT1 receptor such as, exhibiting at least five times more activity on the MT1 receptor compared with the MT2 receptor.