摘要:
There is described a new inclusion complex of nicardipine or its hydrochloride with beta-cyclodextrin, which is prepared by admixing nicardipine or its hydrochloride with beta-cyclodextrin in a molar ratio of the compounds 1:0.9-1.1 under stirring at a temperature from about room temperature to the boiling temprature of the reaction mixture in an aqueous or ethanolic medium, cooling the reaction mixture to 0 ° to 5 °C and isolating the desired complex. The inclusion complex of nicardipine or its hydrochloride possesses cerebrovascular-vasodilatory and coronary-vasodilatory properties, which are equally well expressed as those of nicardipine or its hydrochloride themselves, yet owing to the better solubility of the complex at a higher pH range, such as it exists e.g. in the intestinal tract, the manufacture of sustained release pharmaceutical forms is made possible, whereby a greater extent of dissolution of the active substance is provided also in the intestinal juice.