Found this article concerning intellectual property rightsfor repurposed drugs. Very good read indeed. AGN has a plan.
https://www.lexology.com/library/detail.aspx?g=f19d1544-217e-444f-8c36-06a30e0b81f7#:~:text=Repurposing%20drugs%20is%20further%20incentivized%20through%20the%20granting,new%2C%20useful%2C%20and%20non-obvious%20invention%20for%2020%20years.