Oyster Point Pharma, Inc.  The U.S. Food and Drug Administration (FDA) has approved the Oyster Point Pharma Inc (OYST) product TYRVAYA™ (varenicline solution) Nasal Spray 0.03 mg for the treatment of signs and symptoms of dry eye disease. TYRVAYA™ Nasal Spray TYRVAYA Nasal Spray is the first and only nasal spray approved for the treatment of dry eye disease. TYRVAYA Nasal Spray is believed to bind to cholinergic …