PharmaTher’s 5th FDA orphan drug designation for KETARX™ (ketamine) Phase 2 clinical study results to support proposed Phase 3 development of KETARX™ (ketamine) to treat Rett Syndrome for FDA approval via the 505(b)(2) regulatory pathway TORONTO, Feb. 02, 2023 (GLOBE NEWSWIRE) -- PharmaTher Holdings Ltd. (the “Company” or “PharmaTher”) (OTCQB: PHRRF) (CSE: PHRM), a leader in specialty ketamine pharmaceuticals, today announced that the U.S. Food and Drug Administration (“FDA”) has granted orphan