Human experiments refer to experiments on people (patients or healthy people) to obtain the information needed by the experimenters. Human experiments make medical knowledge based on science and are of great significance to the development of medicine. In the past, in order to explain the essence of diseases more deeply, many medical scientists sorted out and summarized the disease phenomena they saw and recorded, speculated on the causes of diseases, and treated diseases with all the methods they could find according to this understanding.
No matter in the west or China, many medical knowledge recorded in ancient medical books are actually natural events observed in the human body. However, if medicine is limited to recording natural events, it can only describe phenomena and cannot become a real science that consciously explores unknown fields.
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Clinical medical research methods have been in a backward state for a long time, and it is difficult to test whether the understanding and treatment of diseases are correct, which makes some wrong understanding and treatment spread for hundreds of years without being corrected. Animal experiments can be of great help to clinical medicine, but because of the great differences between animals and people, animal experiments cannot replace human experiments.
For example, penicillin, an important drug that is very useful and very safe for human body, is extremely toxic to guinea pigs, a commonly used medical experimental animal. Even if a drug or examination and treatment method has passed pharmacological research and animal experiments, there will always be some risks when it is used in human body for the first time. So the development of medicine makes some human experiments gain experience.