The invention relates to a method for preparing an
indapamide sustained-
release agent, and aims to enable the prepared
indapamide sustained-
release agent to have a better performance. The preparation process comprises the following steps: a, preparing the following materials in proportion: 0.5-2 percent of
indapamide, 30-50 percent of a frame material, 14-28 percent of 100-mesh
lactose, 20-35 percent of 200-mesh
lactose, 10-20 percent of povidone K30 and 0.2-2 percent of
lubricant; b, mixing the indapamide
raw material and the
lactose with two finenesses according to a gradient increasing method; c, mixing with the frame material and the povidone K30; d, adding the
lubricant, and uniformly mixing; and e, tabletting. According to the method, a process of directly tabletting
powder is adopted, so that the method has the advantages that the main
drug is uniformly distributed in the tablet, the tablet has good uniformity (the uniformity index of a tablet with small content is needed to be controlled), influence of water and heating
dryness caused by a traditional manufacture process on the quality of the main
drug can be avoided in the manufacturing process, the production
energy consumption can be reduced, and the production efficiency can be improved.