MEDICINAL COMPOSITION FOR TRANSDERMAL ABSORPTION, MEDICINAL COMPOSITION STORING UNIT AND TRANSDERMAL ABSORPTION PREPARATION USING THE SAME
申请人:Teika Pharmaceutical Co., Ltd.
公开号:EP2123274A1
公开(公告)日:2009-11-25
An object of the invention is to provide a transdermal absorption preparation capable of sustaining the blood morphine concentration at an effective level over at least 48 hours, etc. This transdermal absorption preparation comprises a medicinal composition for transdermal absorption in which an active ingredient selected from morphine and salts thereof is blended in such an amount as corresponding to the saturation solubility or more in an active ingredient-holding vehicle having fluidity at a temperature around the human skin surface temperature and at least a portion of the active ingredient is held in a crystalline form, characterized in that, in the case where a preparation obtained from the above-described medicinal composition for transdermal absorption is applied to the uninjured skin of the back of a white rabbit having been shaven with electrical clippers for 72 hours, the available amount of the active ingredient per single dose of the preparation is from 10 mg to 400 mg in terms of morphine base, and the plasma concentrations of the active ingredient 24 hours and 48 hours after the application of the preparation under the above-described conditions are each at least 40 ng/mL in terms of morphine base, and so on.
本发明的目的是提供一种透皮吸收制剂,能够在至少 48 小时内将血液中的吗啡浓度维持在有效水平等。这种透皮吸收制剂包括一种用于透皮吸收的药物组合物,其中的活性成分选自吗啡及其盐类,其用量相当于在人体皮肤表面温度附近具有流动性的活性成分保持载体中的饱和溶解度或更高,并且至少有一部分活性成分以结晶形式保持,其特征在于、将上述药物组合物制得的透皮吸收制剂涂抹在用电剪剃过毛的白兔背部未受伤的皮肤上 72 小时的情况、以吗啡碱计,每次单剂量制剂中有效成分的可用量为 10 毫克至 400 毫克;以吗啡碱计,在上述条件下使用制剂 24 小时和 48 小时后,有效成分的血浆浓度均至少为 40 纳克/毫升,等等。