Firazorexton hydrate (TAK-994) is a potent, brain-penetrant, and orally active orexin type 2 receptor (OX2R) agonist (EC50: 19 nM). Firazorexton hydrate inhibits fragmentation of wakefulness and cataplexy-like episodes in mouse models of narcolepsy.
References:
[1]. Ishikawa T, et al. TAK-994, a Novel Orally Available Brain-Penetrant Orexin 2 Receptor-Selective Agonist, Suppresses Fragmentation of Wakefulness and Cataplexy-Like Episodes in Mouse Models of Narcolepsy. J Pharmacol Exp Ther. 2023 Jun;385(3):193-204.