Lemborexant

Unassigned

New Medicines

Insomnia

Information

New molecular entity
Eisai
Eisai

Development and Regulatory status

Phase III Clinical Trials
Phase III Clinical Trials
Phase III Clinical Trials

Aug 15: Eisai and Purdue Pharma have formed a global development and commercialisation pact for Eisai´s experimental insomnia therapy lemborexant. The companies said they intend to share the cost of developing the drug which is entering PIII development for insomnia but may also be assessed in other indications under the alliance. If successful, lemborexant will be co-promoted in the US, and potentially other territories, with related costs and profits shared. In other countries, either company can potentially solely market the drug, paying the other a royalty. Also under the terms, Eisai will receive an undisclosed upfront payment from Purdue as well as certain other regulatory and commercial milestone payments [1].

Category

A dual orexin receptor antagonist
Studies indicate that one third of adults in Western countries experience difficulty with sleep initiation or maintenance at least once a week, and 6-15% are thought to meet criteria of insomnia in that they report sleep disturbance as well as significant daytime dysfunction [2].
Insomnia
Oral

Trial or other data

Mar 18: Eisai & Purdue announce that the pivotal PIII study, SUNRISE 1, achieved its primary and key secondary objectives versus placebo and versus an active comparator (zolpidem tartrate extended release) in patients 55 years and older with difficulty staying asleep through the night. The study used objective PSG to determine if 5 mg and 10 mg lemborexant were superior to zolpidem ER 6.25 mg and to placebo. Lemborexant had rates of discontinuation due to adverse events (AEs) comparable to placebo, with the most common AEs in the lemborexant arms being headache and somnolence. Eisai and Purdue plan to present full results of SUNRISE 1 at an upcoming medical meeting in 2018 [6].


Jan 18: PIII SUNRISE-1 trial (NCT02783729) completes [5].


Nov 17: PIII trial (NCT02783729) is still recruiting pts; collection of primary outcome data due to complete Nov 17 [4].


Jun 16: Eisai initiated a PIII trial to evaluate the safety and efficacy of lemborexant in patients with insomnia (NCT02783729; E2006G000-304). In the randomised, double-blind study, enrolment of approximately 950 patients, aged 55 years and older, is underway in the US, France, Germany, Italy, Spain, Japan and the UK, and is expected to extend to Canada [3].