First-in-class1,2,3treatment option to manage the number and intensity of hot flashes and night sweats


TOKYO, December 11, 2023 – Astellas Pharma Inc. (TSE: 4503, President and CEO: Naoki Okamura, “Astellas”) today announced the European Commission (EC) on December 7 approved VEOZA® (fezolinetant) 45 mg once daily for the treatment of moderate to severe vasomotor symptoms (VMS) associated with menopause

VMS, also known as hot flashes and/or night sweats, are common symptoms of menopause.4,5 Worldwide, more than half of women 40 to 64 years of age experience VMS, with rates in Europe ranging from 56% to 97%.6,7,8 The prevalence of moderate to severe VMS in postmenopausal women in Europe has been reported at 40%.9 VMS can have a disruptive impact on women’s daily activities and overall quality of life.2

Prof. Rossella Nappi, Full Professor of Obstetrics and Gynecology, Chief of the Research Center for Reproductive Medicine and Director of the Gynecological Endocrinology & Menopause Unit, IRCCS San Matteo Foundation, University of Pavia

“I’ve been awaiting the marketing authorization of fezolinetant. I’m happy to see this advancement in women’s health and that my patients will soon have this new nonhormonal treatment option available to control their moderate to severe VMS.”

Marci English, Vice President, Head of BioPharma Development, Astellas

“Fezolinetant’s novel mechanism of action targets the root cause of moderate to severe VMS associated with menopause. We are proud to have developed a treatment option for a condition that has lacked scientific advancement for too long.”

This approval follows a positive opinion issued in October by the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) based on the results from the BRIGHT SKY™ program, which included three Phase 3 clinical trials as part of a development program that collectively enrolled over 3,000 across Europe, the U.S. and Canada. Results from the SKYLIGHT 1™ and SKYLIGHT 2™ pivotal trials characterize the efficacy and safety of fezolinetant for the treatment of moderate to severe VMS associated with menopause and were published in The Lancet and The Journal of Clinical Endocrinology & Metabolism, respectively.10,11 Data from the SKYLIGHT 4™ safety study further characterizes the long-term safety profile of fezolinetant and was published in Obstetrics & Gynecology.12

The EC marketing authorization for fezolinetant is applicable in the European Union (EU) Member States, as well as Iceland, Norway and Liechtenstein.13 Fezolinetant was also approved in Switzerland on December 4, 2023. 

Astellas has already reflected the impact from this matter in its financial forecast of the current fiscal year ending March 31, 2024.

For more information, please see the press releases “European Medicines Agency Accepts Astellas’ Marketing Authorization Application for Fezolinetant” issued on September 29, 2022, and “Astellas Receives Positive CHMP Opinion for VEOZATM (fezolinetant)” issued on October 16, 2023.


About the BRIGHT SKY™ Phase 3 Program

The BRIGHT SKY pivotal trials, SKYLIGHT 1™ (NCT04003155) and SKYLIGHT 2™ (NCT04003142), enrolled over 1,000 women with moderate to severe VMS. The trials are double-blinded, placebo-controlled for the first 12 weeks followed by a 40-week treatment extension period. Women were enrolled at over 180 sites within the U.S., Canada and Europe. SKYLIGHT 4™ (NCT04003389) is a 52-week double-blinded, placebo-controlled study designed to investigate the long-term safety of fezolinetant. For SKYLIGHT 4, over 1,800 women with VMS were enrolled at over 180 sites within the U.S., Canada and Europe.

The safety of fezolinetant 45 mg has been evaluated studied in 2,203 women with VMS associated with menopause receiving fezolinetant once daily in Phase 3 clinical studies. The most common adverse reactions with fezolinetant 45 mg were diarrhea (3.2%) and insomnia (3.0%). There were no serious adverse reactions reported at an incidence greater than 1% across the total study population. On fezolinetant 45 mg, four serious adverse reactions were reported. The most serious adverse reaction was an event of endometrial adenocarcinoma (0.1%).

About VEOZA® (fezolinetant)

Fezolinetant is a nonhormonal neurokinin 3 (NK3) receptor antagonist indicated in the EU and European Economic Area countries for the treatment of moderate to severe vasomotor symptoms (VMS) associated with menopause. VMS are also known as hot flashes or night sweats. Fezolinetant works by blocking neurokinin B (NKB) binding on the kisspeptin/neurokinin/dynorphin (KNDy) neuron to modulate neuronal activity in the brain’s temperature control center (the hypothalamus) to reduce the number and intensity of hot flashes and night sweats.1,2,3

Important Safety Information

The full European Summary of Product Characteristics (SPC/SmPC) for fezolinetant will be available from the European Medicines Agency at

About Astellas

Astellas Pharma Inc. is a pharmaceutical company conducting business in more than 70 countries around the world. We are promoting the Focus Area Approach that is designed to identify opportunities for the continuous creation of new drugs to address diseases with high unmet medical needs by focusing on Biology and Modality. Furthermore, we are also looking beyond our foundational Rx focus to create Rx+® healthcare solutions that combine our expertise and knowledge with cutting-edge technology in different fields of external partners. Through these efforts, Astellas stands on the forefront of healthcare change to turn innovative science into VALUE for patients. For more information, please visit our website at

Cautionary Notes

In this press release, statements made with respect to current plans, estimates, strategies and beliefs and other statements that are not historical facts are forward-looking statements about the future performance of Astellas. These statements are based on management’s current assumptions and beliefs in light of the information currently available to it and involve known and unknown risks and uncertainties. A number of factors could cause actual results to differ materially from those discussed in the forward-looking statements. Such factors include, but are not limited to: (i) changes in general economic conditions and in laws and regulations, relating to pharmaceutical markets, (ii) currency exchange rate fluctuations, (iii) delays in new product launches, (iv) the inability of Astellas to market existing and new products effectively, (v) the inability of Astellas to continue to effectively research and develop products accepted by customers in highly competitive markets, and (vi) infringements of Astellas’ intellectual property rights by third parties. Information about pharmaceutical products (including products currently in development) which is included in this press release is not intended to constitute an advertisement or medical advice.


Contacts for inquiries or additional information:

Astellas Portfolio Communications

Nana Hilbourne

+44 7435 661705

[email protected]

Astellas Pharma Inc. Corporate Communications




1 Depypere H, Timmerman D, Donders G, et al. Treatment of menopausal vasomotor symptoms with fezolinetant, a neurokinin 3 receptor antagonist: a phase 2a trial. J Clin Endocrinol Metab. 2019;104:5893-5905.

2  Fraser GL, Lederman S, Waldbaum A, et al. A phase 2b, randomized, placebo-controlled, double-blind, dose-ranging study of the neurokinin 3 receptor antagonist fezolinetant for vasomotor symptoms associated with menopause. Menopause. 2020;27:382-392.

3 Fraser GL, Hoveyda HR, Clarke IJ, et al. The NK3 receptor antagonist ESN364 interrupts pulsatile LH secretion and moderate levels of ovarian hormones throughout the menstrual cycle. Endocrinology. 2015;156:4214-4225.

4 Utian WH. Psychosocial and socioeconomic burden of vasomotor symptoms in menopause: a comprehensive review. Health Qual Life Outcomes. 2005;3:47.

5 Jones RE, Lopez KH, eds. Human Reproductive Biology. 4th ed. Waltham, MA: Elsevier, 2014:120. 

6 Makara-Studzinska MT, Krys-Noszczyk KM, Jakiel G. Epidemiology of the symptoms of menopause - an intercontinental review. Przegl Menopauzalny [Menopause Rev]. 2014;13:203-211.

7 Gold EB, Colvin A, Avis N, et al. Longitudinal analysis of the association between vasomotor symptoms and race/ethnicity across the menopausal transition: study of women's health across the nation. Am J Public Health. 2006;96:1226-1235.

8 Williams RE, Kalilani L, DiBenedetti DB, et al. Frequency and severity of vasomotor symptoms among peri- and postmenopausal women in the United States. Climacteric. 2008;11:32-43.

9 Nappi RE, Kroll R, Siddiqui E, et al. Global cross-sectional survey of women with vasomotor symptoms associated with menopause: prevalence and quality of life burden. Menopause. 2021; 28:875-882.

10 Lederman S, Ottery F, Cano A et al. Fezolinetant for treatment of moderate-to-severe vasomotor symptoms associated with menopause (SKYLIGHT 1): a phase 3 randomised controlled study. The Lancet. March 13, 2023. doi:10.1016/S0140-6736(23)00085-5.

11 Johnson K, Martin N, Nappi R et al. Efficacy and safety of fezolinetant in moderate-to-severe vasomotor symptoms associated with menopause: A Phase 3 RCT. The Journal of Clinical Endocrinology & Metabolism. 2023;00:1-17.

12 Neal-Perry G, Cano A, Lederman S, et al. Safety of fezolinetant for vasomotor symptoms associated with menopause: a randomized controlled trial. Obstetrics & Gynecology. March 9, 2023. doi:10.1097/AOG.0000000000005114.

13 European Medicines Agency. Authorization of medicines. Available at: Accessed August 7, 2023.



December 2023 MAT-GB-FEZ-2023-00008


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