The safest desiccant is silica gel desiccant, which can come into direct contact with the medicine. When it becomes saturated with water, it will change color, indicating that the humidity in the storage environment of the medicine is too high and the storage environment and desiccant need to be replaced. This also indicates that desiccants have a protective effect on drugs and should not be thrown away immediately after opening. Pharmaceutical desiccants should possess characteristics such as safety, environmental friendliness, non-toxicity, harmlessness, and strong hygroscopicity. Most importantly, they should obtain the "Pharmaceutical Packaging Materials Registration Certificate" issued by the State Administration for Market Regulation.
