All drugs are regulated by the FDA, even if a drug patent is expired you need to get FDA approval to sell a generic version, which would cost millions. The only

All drugs are regulated by the FDA, even if a drug patent is expired you need to get FDA approval to sell a generic version, which would cost millions. The only way around this, is if you market your product as not for human consumption or make some obscure research drug and market it as a health supplement. Of course the latter two eventually will get you in deep shit with the FDA.