CALCIUM CHANNEL ANTAGONIST POSSESSING AN INHIBITORY ACTION AGAINST SECRETION OF PARATHYROID HORMONES AND A USE THEREOF

摘要

Disclosed is a calcium channel antagonist effective as a single substance forattaining dual purposes of inhibiting secretion of parathyroid hormones and ofpromoting absorption and utilization of calcium in human body as well as aprocessfor preparing the calcium channel antagonist. According to the presentinvention. thecalcium channel antagonist is prepared by baking a calciferous material ofplant originat a temperature of 500-1000°C under reduce pressure or vacuum andextracting thebaked material with and acidic substance. The calcium channel antagonist maybeincorporated with a conventional calcium preparations to enhancebioavailability ofcalcium. Further, the calcium channel antagonist of the present invention maybeprocessed to calcium preparations in the form of porous granules