March 20 (Reuters) - U.S. Food and Drug Administration approved Alnylam's ALNY.O drug to treat a rare and deadly heart disease on Thursday, allowing the entry of a new type of medicine in a market dominated by Pfizer's PFE.N blockbuster Vyndaqel.
(Reporting by Bhanvi Satija in Bengaluru; Editing by Alan Barona)
((Bhanvi.Satija@thomsonreuters.com; Outside U.S. +91 9873062788))