As of April 21, 2023, Vallon Pharmaceuticals, Inc. was acquired by GRI Bio, Inc., in a reverse merger transaction. Vallon Pharmaceuticals, Inc., a clinical-stage biopharmaceutical company, focuses on the development and commercialization of novel medications for central nervous system disorders with a focus on abuse-deterrent medications. The company's lead investigational product candidate is ADAIR (Abuse-Deterrent Amphetamine Immediate-Release), an abuse-deterrent oral formulation of immediate-release dextroamphetamine for the treatment of attention-deficit/hyperactivity disorder (ADHD) and narcolepsy. It is also developing ADMIR, an abuse deterrent formulation of methylphenidate for the treatment of ADHD. The company was incorporated in 2018 and is based in Philadelphia, Pennsylvania.