First, the content of active ingredients in the drug is reduced after expiration, and the drug cannot exert its original curative effect. Sometimes, it even leads to changes in the chemical composition of drugs, which is harmful to human body. For example, vitamin C is easily oxidized if it is left in the air for too long, and oxidized VC is harmful to human body. Sulfonamides and penicillins are out of date, which is easy to cause allergy and shock.
Secondly, the storage temperature of drugs can not meet the standard, and the drugs themselves may decompose some harmful impurities, which may easily cause certain harm to the human body.
Third, drugs stored in dry places for a long time will dehydrate; Stored in a damp place, the medicine will also absorb water. After moisture absorption or dehydration, the drug will not decompose when it enters the human body. Therefore, the human body cannot effectively absorb it. "Eating is equal to eating for nothing."
Fourth, drugs containing excipients, such as granules and honeyed pills, will be mildewed at a certain temperature and breed bacteria, which is difficult to distinguish with the naked eye.
The validity period of drugs is strictly demonstrated.
Huang Huaide, director of the Provincial Digestion Center, said that the validity period of drugs was strictly calculated by the relevant departments through experiments. At present, the validity period of all listed drugs is generally within 1-5 years. He suggested that patients should read the instructions carefully before buying or taking drugs. Don't store too many medicines at home. Besides, you should clean the small medicine cabinet at home every once in a while and get rid of the expired medicine. You shouldn't take them just for convenience, it will harm your health.
In addition, relevant persons from the US Food and Drug Administration also reminded the public not to throw discarded drugs at will. Some special drugs are discarded at will, and the water quality will endanger human health. Take penicillin as an example, if it is handled by itself, improperly protected or released into the air, it may cause skin allergies in the surrounding people. Experts from the Environmental Protection Bureau pointed out that littering expired drugs will cause great pollution to the environment. Many drugs contain a variety of chemical elements, and once they invade drinking water sources, they will cause harm to all parties.