1. The remaining drugs are not enough for a course of treatment; Not commonly used drugs. This kind of medicine if stored more inconvenient management, also easy to cause confusion.

　　2. Drugs that are easy to decompose and deteriorate are not left. For example, aspirin is easy to decompose substances that stimulate gastrointestinal tract; Vitamin C is long buy decompose can lose medicaments to wait.

　　3. Drugs with short validity and no long-term retention value are not retained. Be like emulase to live piece, pepsin mixture to wait, place time is longer can reduce medicinal effect.

　　4. No medicine left behind without good packaging. Some medicines are easily spoiled by moisture and need to be packed away from light and moisture. Such as packaging bad tablets after absorption of moisture will be mildewy. Do not indicate the expiry date and expiration date of scattered drugs or packaging has been abandoned drugs should not stay. The storage time and efficacy of these drugs cannot be determined.

　　5. Do not grasp the role and use of drugs do not stay. Without knowing its indications, it is impossible and impossible to apply it again.

　　6. Injection and some antibiotic eye drops should not be kept. Injections usually have less than one course of treatment, and drugs such as penicillin must be tested on the skin before injection and administered under the guidance of medical staff. There are also some antibiotic eye drops, need to make up temporarily, placed for a long time will deteriorate failure.