The shares of orphan drugmaker Raptor Pharmaceuticals (NASDAQ: RPTP) have been on a tear since the FDA approval of its nephropathic cystinosis drug Procysbi. Year to date, shares are up more than 140%, and investors heard more good news last week after the drug won approval in the EU. In the following video, from the Motley Fool's health-care show Market Checkup, analysts discuss what this decision means for Raptor investors.