A microcapsule produced by preparing a water-in-oil emulsion comprising an inner aqueous layer containing said water-soluble drug and a drug retaining substance therefor and an oil layer containing a polymer substance, then thickening or solidifying said inner aqueous layer to a viscosity of not lower than about 5000 centiposes and finally subjecting the resulting emulsion to in water drying gives prolonged release of water-soluble drug.
通过制备一种
水-油乳液,其中包含一个内部
水相层,该层含有所述
水溶性药物和药物保留物质,以及一个含有聚合物物质的油相层,然后将内部
水相层增稠或固化至不低于约5000厘泊的粘度,最后将得到的乳液在
水中干燥,可以得到
水溶性药物的长效释放的微胶囊。