General drugs can apply for invention patents. You can consult a local patent agency and apply for a patent. However, prescriptions written in published books cannot be approved, unless the ancient medical books you are talking about are your own and have not been made public.
If it is an ancestral secret medicine and its ingredients are not easily visible from the finished product, it is recommended not to blindly apply for a patent. Applications for patents are generally disclosed to the public, and the patent protection period (usually 20 In 2016, the protection period of drug invention patents can be extended appropriately, but not for long) is limited, and patent protection is regional. By then, everyone around the world will know about it, but you can only go to the country where you did not apply. Used for free