吸湿是药物粉末的重要特性。在药剂工作中,有的药物如氯化鈣、干燥硫酸鈉、溴化鈉、碘化鉀、醋酸鉀、氯化銨等,吸湿后变潮或液化,可使用量不准;干浸膏、蛋白銀、汞溴紅、枸橼酸铁銨、阿片粉等,吸湿則成硬块或胶結在一起,以致称取与混合均感困难;泡騰散剂,吸湿后則逐漸发生二氧化碳而失去泡騰作用;有的药物吸湿后甚至有变质的,如青霉素、維生素C、淀粉酶、胃蛋白酶、洋地黄、阿司匹林、漂白粉等等。近年来,药剂生产上已应用机械进行分装,药物 Moisture absorption is an important property of pharmaceutical powders. In pharmaceutical work, some drugs such as calcium chloride, dried sodium sulfate, sodium bromide, potassium iodide, potassium acetate, ammonium chloride, after moisture or tidal liquefied, the amount can not be allowed; dry extract, silver protein , Mercury bromide red, ferric ammonium citrate, opium powder, moisture absorption is lumps or cemented together, resulting in both weighing and mixing are difficult; effervescent powder, after absorption of moisture and the gradual occurrence of carbon dioxide effervescent effect; Some drugs even degenerate after moisture absorption, such as penicillin, vitamin C, amylase, pepsin, digitalis, aspirin, bleach and so on. In recent years, pharmaceutical production has been applied mechanical packing, drugs