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E2086 is an orally bioavailable, selective and potent small molecule agonist of the orexin receptor type 2 (orexin-2 receptor), developed by Eisai for the treatment of narcolepsy type 1. The drug is designed to compensate for orexin loss in patients with narcolepsy, aiming to increase wakefulness and reduce cataplexy episodes. Nonclinical studies have shown that E2086 increases time spent awake and reduces cataplexy-like episodes in animal models. As of mid-2024, it is in Phase I clinical trials for narcolepsy type 1[1][3][4][7].
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