Can expired Yunnan black plaster be reused?

All expired drugs, including all kinds of plasters, can no longer be used. After expiration, drugs are no longer stable or ineffective, and some may have other toxic and side effects. Not only can they not cure the disease, but they will aggravate the condition or produce new diseases. The risk of using expired drugs is often huge, and such a risk is not worth taking. It is best to destroy expired drugs, and don't throw them away casually, so as to avoid being misused by children or reused by others, causing harm.