--First-in-Class RASP Modulator Represents a Potential New Therapeutic Paradigm for Patients Suffering from Dry Eye Disease

Aldeyra Therapeutics, Inc. (Nasdaq: ALDX) (Aldeyra) today announced that the U.S. Food and Drug Administration (FDA) has accepted the New Drug Application (NDA) for topical ocular reproxalap, a first-in-class investigational new drug candidate, for the treatment of the signs and symptoms of dry eye disease. The FDA assigned a Prescription Drug User Fee Act (PDUFA) date of November 23, 2023. The FDA noted that no potential filing review issues have been identified, and that an advisory committee meeting is not currently planned.

"NDA acceptance marks a critical regulatory milestone for Aldeyra as reproxalap continues to advance toward potential regulatory approval for the treatment of dry eye disease," stated Todd C. Brady, M.D., Ph.D., President and Chief Executive Officer of Aldeyra. "Based on data from a number of late-stage clinical trials, we believe reproxalap has the potential to address the need for a rapid and durable ophthalmic therapy for the millions of dry eye disease patients who are dissatisfied with currently available therapies."

The NDA is supported by previously announced safety and efficacy results from five adequate and well-controlled clinical trials encompassing data for ocular dryness symptom score, ocular redness, Schirmer test, and Schirmer test greater-than or equal to10 mm responder analysis. The NDA includes activity ranging from within minutes of drug administration to up to 12 weeks of treatment, crossover and parallel-group clinical trial designs, and assessment in dry eye chamber challenge and natural environment settings. Topical ocular reproxalap has been studied in more than 2,000 patients with no observed clinically significant safety concerns; mild and transient instillation site irritation is the most commonly reported adverse event in clinical trials.