一些读者常来信说:中成药不标有效期和失效期,有些上世纪七十年代和八十年代的产品还给患者服用,患者往往不敢吃,怕治不好病,还影响身体健康。不注明失效期的中成药,怎样辨别其好坏?中成药确实没有明确规定有效期和失效期,但是由于包装各不相同,保证质量的差异很大。有些比较严 Some readers often wrote in letters saying that proprietary Chinese medicines are not marked with expiration dates and expiry dates. Some products from the 1970s and 1980s were returned to patients. Patients often do not dare to eat, and they are afraid of treating poor health and affecting their health. For Chinese patent medicines that do not indicate the expiration date, how can they be distinguished? Chinese patent medicines do not clearly specify the expiration date and expiry date, but due to the differences in packaging, the quality of guarantees varies widely. Some are more strict