DURHAM, N.C.--(BUSINESS WIRE)--Inspire Pharmaceuticals, Inc. (NASDAQ: ISPH) announced today it has submitted a clinical protocol and request for Special Protocol Assessment (SPA) to the U.S. Food and Drug Administration (FDA) for a pivotal Phase 3 environmental trial with Prolacria™ (diquafosol tetrasodium ophthalmic solution) for the treatment of dry eye disease.
