The tablets, capsules, granules, oral liquids and injections we usually eat are all called preparations in pharmacy. The preparation consists of main medicine and auxiliary materials. Auxiliary materials are mainly used for filling, helping disintegration and dissolution, coating, molding and targeted administration. The main drug is the active component, that is, the component that plays a pharmacological role in the drug. Before preparation, these active ingredients are raw materials of drugs, mostly powdery substances, which are highly pure drugs. The tablets we usually take are about 0. 1g to 0.5g, but the active ingredients in them are only a few milligrams to several hundred milligrams. Eating raw materials alone is not conducive to absorption and quantitative administration. If you directly take 1 g raw material medicine, no matter what medicine, it is very dangerous and will kill people.
Generic drugs are drugs that are not protected by patents. A drug with an expired patent means that the patent of this drug has passed the protection period, which is equivalent to no patent. During the patent period, most of these expired patented drugs have been well marketed by patent-owned companies. After the protection period, it can be copied, that is, generic drugs. Some generic drugs are the drugs of the other party within the protection period, but it is also allowed to add crystal water or change salt to the drugs to imitate them. Most of our country is generic drugs.