The present invention is directed to methods comprising administering a composition comprising a therapeutically effective amount of (R)-verapamil, a derivative thereof, or a pharmaceutically acceptable salt thereof, wherein the composition treats, prevents and/or manages at least one condition having MT1 receptor, 5-HT2B receptor and L-type calcium channel activity and releases the (R)-verapamil, a derivative thereof or a pharmaceutically acceptable salt thereof to exhibit a co-primary activity on the MT1 receptor, the 5-HT.sub.2B receptor, and the L-type calcium channel.