Was the "big pharma" snark really necessary? Seems to me drug repurposing would be a huge profit-maker.
I don't necessarily agree with the snark but we'd probably be better off if more medical research were not profit-motivated.
That's not entirely true. There are programs in the US and UK which offer "marketing exclusivity" for companies that perform trials validating new uses for existing drugs. These aren't exactly patents, but it does provide a financial incentive.