PHARMAZEUTISCHE ZUBEREITUNG FUER DIE INTRAREKTALE VERABREICHUNG VON CALCITONIN UND DARAUS HERGESTELLTE EINZELDOSISFORMEN

New compositions containing a calcitonin as the active ingredient are described which are suitable for the intrarectal administration as soft gelatin capsules or microenemas, wherein the active principle, optionally admixed with a stabilizer, is dissolved in a liquid vehicle consisting of : a) at least 70 % by weight of a polyethylene or a polypropylene glycol or a mixture of polyethylene or polypropylene glycols with different molecular weights, having the consistency of a homogeneous fluid at room temperature, and b) less than 15 % by weight of a buffer in a pH range of from 4.5 to 6.5, and optionally c) less than 15 % by weight of an alcohol of 2 to 6 carbon atoms containing two or more hydroxy groups. The new compositions, which do not contain any absorption aid, give calcitonin plasma levels comparable to a conventional intramuscular administration.