Maybe you don't know much about patents.
In the process of patent examination, whether drugs are effective or not is not examined;
The examination made by the examiner is based on the text submitted by the applicant.
In other words, the examiner is based on the fact that all the experimental data in the patent documents are true.
Therefore, as long as the patent text meets the authorization conditions stipulated in the patent law (the technical scheme is clear and complete, novel and creative, etc.). ), patents can be granted.
The patent right itself is only a kind of prohibition right, which can prohibit others from using the patent.
In other words, owning a patent does not mean that the patentee can implement the contents of the patent.
If the drug is really ineffective or harmful, it will be reviewed by other departments and will not harm the public interest.