Orexo announces positive outcome from an in-vivo study of OX390
Uppsala, Sweden – May 19, 2026 – Orexo AB (publ.), (STO:ORX) (OTCQX:ORXOY), today announces positive data from a pre-clinical in-vivo study on the nasal absorption of atipamezole when delivered with Orexo’s AmorphOX® drug delivery technology. The study results mark an important milestone in the development of OX390, an emergency treatment to reverse overdoses involving xylazine and medetomidine, alpha-2 agonists often referred to as “Tranq” and “Rhino Tranq”, respectively. The study demonstrated rapid and substantial intranasal absorption of atipamezole, successfully establishing