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Pharma Tech Outlook | Monday, March 15, 2021
Eisai gets approval for the in-house developed anti-insomnia drug, Dayvigo (Lemborexant), in Hong Kong.
FREMONT, CA: Eisai Co.’s Hong Kong subsidiary Eisai (Hong Kong) obtains approval for the in-house-developed orexin receptor antagonist DAYVIGO (lemborexant) for the treatment of insomnia in adults, characterized by issues with sleep onset and/or sleep management. This approval is the first for DAYVIGO in Asia outside of Japan.
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DAYVIGO is a dual orexin receptor antagonist that limits orexin neurotransmission regulating sleep-wake rhythm by combining competitively to the two types of orexin receptors (OX1R and OX2R). DAYVIGO acts on the orexin neurotransmitter system and is believed to give sleep onset, sleep maintenance, and wake by regulating sleep-wake rhythm. DAYVIGO integrates to orexin receptors OX1R and OX2R and acts as a competitive antagonist with stronger inhibition impact on OX2R, which suppresses both REM and non-REM sleep drive, such that DAYVIGO may offer faster sleep onset and better sleep maintenance to patients.
In June 2020, DAYVIGO was released in the U.S. for the treatment of adult patients with insomnia, characterized by problems with sleep onset and/or sleep maintenance; and in July 2020, DAYVIGO was rolled out in Japan for the treatment of insomnia. In addition, DAYVIGO has been approved in Canada, and an application for approval has been submitted in Australia. In Asia, Eisai has presently submitted applications to the respective regulatory authorities in India, Indonesia, Malaysia, the Philippines, Singapore, Taiwan, and Thailand and plans to widen submissions of applications for approval in other countries.
Insomnia is among the common sleep-wake disorders. Approximately 30 percent of adults worldwide have symptoms of insomnia. In Hong Kong, over 35 percent of adults are reported to have symptoms of insomnia. Older adults also have a higher prevalence rate, with many experiencing insomnia symptoms for months to years. As a result, insomnia causes social losses, such as long absences and lessened productivity. It can increase the risk of falls in older adults. Eisai will continue its efforts to offer DAYVIGO as a new treatment option to insomnia patients across the globe with the hope of contributing to the restoration of daytime function and recovery for patients with insomnia by potentially providing an active daytime life through fast sleep onset and good quality sleep.
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