First, there is no authority to verify whether your medicine is effective, so it is worthless.
Second, your medicine really works, and you have found authority. If you are not a medical expert, there is no residual value except prescription. If others take your own medicine casually, you will have no temper.
The third is to produce their own medicine. You have to go through layers of examination and approval, seal, pull relationships and invest. In the end, you may not be able to do it. You can't sell it if you make it, otherwise it's worthless.
Fourth, you apply for a patent, and then, it's still worthless to take the one, two, three road.