Whether or not mannitol can be reused is related to the method of administration. Generally, it can be reused when used externally, and if taken internally, it does not involve reuse. The details are as follows: 1. External use: Mannitum has the effect of clearing fire and reducing swelling, and can be used externally to treat canker sores, swollen and painful hemorrhoids, etc. It can be reused at this time, usually by baking the mangosteen dry at high temperatures to remove excess water from it, and then breaking it up for external application. It can be reused twice, but in a new bag. In addition, this type of mangosteen should not be reintroduced into the decoction for internal use. 2. Internal use: Mangosteen has the effect of laxative and laxative, moistening and softening, and can be used for conditions such as solid heat and stagnation, abdominal fullness and distension, dry stools, intestinal carbuncle and swelling and pain. Generally internal drugs will be taken by the patient at once, and the dregs lose their therapeutic utility, and do not involve the question of whether they can be reused. If, in the course of repeated use, the texture of mannitol is found to have changed significantly, for example, into a crystalline structure, then repeated use is not recommended, in order to avoid changes in the efficacy of the medicine and failure to achieve the corresponding therapeutic effect, and even serious cases can affect health.