LONDON, April 21, 2016 (GLOBE NEWSWIRE) — GW Pharmaceuticals plc (Nasdaq:GWPH) (AIM:GWP) (“GW” or “the Company”), a biopharmaceutical company focused on discovering, developing and commercializing novel therapeutics from its proprietary cannabinoid product platform, today announced that the U.S. Food and Drug Administration (FDA) has granted Orphan Drug Designation for cannabidiol …