大日本住友製薬（4506） – Myovant and Pfizer Provide Update on Supplemental sNDA for MYFEMBREE for the Management of Moderate to Severe Pain Associated with Endometriosis

April 12, 2022 Sumitomo Pharma Co., Ltd. Myovant Sciences and Pfizer Provide Update on Supplemental New Drug Application for MYFEMBREE® for the Management of Moderate to Severe Pain Associated with Endometriosis Sumitomo Pharma Co., Ltd. (Head Office: Osaka, Japan; Representative Director, President, and CEO: Hiroshi Nomura; Securities Code: 4506, Prime Market of TSE) announced today that on April 12, 2022 (local time), its consolidated subsidiary, Myovant Sciences Ltd. (NYSE: MYOV) and Pfizer Inc. (NYSE: PFE) announced an update on the Supplemental New Drug Application (sNDA) for MYFEMBREE ® (relugolix 40 mg, estradiol 1 mg and norethindrone acetate 0.5 mg) for the management of moderate to severe pain associated with endometriosis as per the attachment. Sumitomo Pharma will announce a result of the FDA’s review once the Company receives it. The impact of this matter on our consolidated financial results will be announced as soon as it becomes clear. Contact: Corporate Communications Sumitomo Pharma Co., Ltd. TEL: +81-6-6203-1407 (Osaka); +81-3-5159-3300 (Tokyo) Myovant Sciences and Pfizer Provide Update on Supplemental New Drug Application forMYFEMBREE® for the Management of Moderate to Severe Pain Associated with EndometriosisApril 12, 2022BASEL, Switzerland and NEW YORK, April 12, 2022 (GLOBE NEWSWIRE) — Myovant Sciences (NYSE: MYOV) and Pfizer (NYSE: PFE) announcedtoday an update on the Supplemental New Drug Application (sNDA) for MYFEMBREE® (relugolix 40 mg, estradiol 1 mg and norethindrone acetate0.5 mg) for the management of moderate to severe pain associated with endometriosis.In accordance with the ongoing review of the application, on April 6, 2022, the U.S. Food and Drug Administration (FDA) provided notice to thecompanies that the agency identified deficiencies that preclude discussion of labeling and/or post-marketing requirements and commitments at thistime. The FDA did not provide additional detail. The FDA noted that the letter does not reflect a final decision on the pending sNDA and that theapplication is still under review.Myovant and Pfizer will continue to work with the FDA to determine next steps with the application.About MYFEMBREE®MYFEMBREE (relugolix, estradiol, and norethindrone acetate) is the first once-daily oral treatment for heavy menstrual bleeding associated withuterine fibroids in premenopausal women approved by the U.S. Food and Drug Administration, with a treatment duration of up to 24 months.MYFEMBREE contains relugolix, which reduces the amount of estrogen (and other hormones) produced by ovaries, estradiol (an estrogen) whichmay reduce the risk of bone loss, and norethindrone acetate (a progestin) which is necessary when women with a uterus (womb) take estrogen.For full prescribing information including Boxed Warning and patient information, please click here.Indications and UsageMYFEMBREE is indicated for the management of heavy menstrual bleeding associated with uterine leiomyomas (fibroids) in premenopausal women.Limitations of Use: Use of MYFEMBREE should be limited to 24 months due to the risk of continued bone loss which may not be reversible.Important Safety InformationBOXED WARNING: THROMBOEMBOLIC DISORDERS AND VASCULAR EVENTSEstrogen and progestin combination products, including MYFEMBREE, increase the risk of thrombotic or thromboembolic disordersincluding pulmonary embolism, deep vein thrombosis, stroke and myocardial infarction, especially in women at increased risk for theseevents.MYFEMBREE is contraindicated in women with current or a history of thrombotic or thromboembolic disorders and in women at increasedrisk for these events, including women over 35 years of age who smoke or women with uncontrolled hypertension.CONTRAINDICATIONSMYFEMBREE is contraindicated in women with any of the following: high risk of arterial, venous thrombotic, or thromboembolic disorder; pregnancy;known osteoporosis; current or history of breast cancer or other hormone-sensitive malignancies; known hepatic impairment or disease; undiagnosedabnormal uterine bleeding; known hypersensitivity to components of MYFEMBREE. WARNINGS AND PRECAUTIONSThromboembolic Disorders: Discontinue immediately if an arterial or venous thrombotic, cardiovascular, or cerebrovascular event occurs or issuspected. Discontinue at least 4 to 6 weeks before surgery associated with an increased risk of thromboembolism, or during periods of prolongedimmobilization, if feasible. Discontinue immediately if there is sudden unexplained partial or complete loss of vision, proptosis, diplopia, papilledema,or retinal vascular lesions and evaluate for retinal vein thrombosis as these have been reported with estrogens and progestins.Bone Loss: MYFEMBREE may cause a decrease in bone mineral density (BMD) in some patients, which may be greater with increasing duration ofuse and may not be completely reversible after stopping treatment. Consider the benefits and risks in patients with a history of low trauma fracture orrisk factors for osteoporosis or bone loss, including medications that may decrease BMD. Assessment of BMD by dual-energy X-ray absorptiometry(DXA) is recommended at baseline and periodically thereafter. Consider discontinuing MYFEMBREE if the risk of bone loss exceeds the potentialbenefit.Hormone-Sensitive Malignancies: Discontinue MYFEMBREE if a hormone-sensitive malignancy is diagnosed. Surveillance measures inaccordance with standard of care, such as breast examinations and mammography are recommended. Use of estrogen alone or estrogen plusprogestin has resulted in abnormal mammograms requiring further evaluation.Depression, Mood Disorders, and Suicidal Ideation: Promptly evaluate patients with mood changes and depressive symptoms including shortlyafter initiating treatment, to determine whether the risks of continued therapy outweigh the benefits. Patients with new or worsening depression,anxiety, or other mood changes should be referred to a mental health professional, as appropriate. Advise patients to seek immediate medicalattention for suicidal ideation and behavior and reevaluate the benefits and risks of continuing MYFEMBREE.Hepatic Impairment and Transaminase Elevations: Steroid hormones may be poorly metabolized in these patients. Instruct women to promptlyseek medical attention for symptoms or signs that may reflect liver injury, such as jaundice or right upper abdominal pain. Acute liver test abnormalitiesmay necessitate the discontinuation of MYFEMBREE use until the liver tests return to normal and MYFEMBREE causation has been excluded.Gallbladder Disease or History of Cholestatic Jaundice: Discontinue MYFEMBREE if signs or symptoms of gallbladder disease or jaundice occur.For women with a history of cholestatic jaundice associated with past estrogen use or with pregnancy, assess the risk-benefit of continuing therapy.Studies among estrogen users suggest a small increased relative risk of developing gallbladder disease.Elevated Blood Pressure: For women with well-controlled hypertension, monitor blood pressure and stop MYFEMBREE if blood pressure risessignificantly.Change in Menstrual Bleeding Pattern and Reduced Ability to Recognize Pregnancy: Advise women to use non-hormonal contraception duringtreatment and for one week after discontinuing MYFEMBREE. Avoid concomitant use of hormonal contraceptives. MYFEMBREE may delay the abilityto recognize pregnancy because it alters menstrual bleeding. Perform testing if pregnancy is suspected and discontinue MYFEMBREE if pregnancy isconfirmed.Risk of Early Pregnancy Loss: MYFEMBREE can cause early pregnancy loss. Exclude pregnancy before initiating and advise women to useeffective non-hormonal contraception.Uterine Fibroid Prolapse or Expulsion: Advise women with known or suspected submucosal uterine fibroids about the possibility of uterine fibroidprolapse or expulsion and instruct them to contact their physician if severe bleeding and/or cramping occurs.Alopecia: Alopecia, hair loss, and hair thinning were reported in phase 3 trials with MYFEMBREE. Consider discontinuing MYFEMBREE if hair lossbecomes a concern. Whether the hair loss is reversible is unknown.Effects on Carbohydrate and Lipid Metabolism: More frequent monitoring in MYFEMBREE-treated women with prediabetes and diabetes may benecessary. MYFEMBREE may decrease glucose tolerance and result in increased blood glucose concentrations. Monitor lipid levels and considerdiscontinuing if hypercholesterolemia or hypertriglyceridemia worsens. In women with pre-existing hypertriglyceridemia, estrogen therapy may beassociated with elevations in triglycerides levels leading to pancreatitis. Use of MYFEMBREE is associated with increases in total cholesterol andLDL-C.Effect on Other Laboratory Results: Patients with hypothyroidism and hypoadrenalism may require higher doses of thyroid hormone or cortisolreplacement therapy. Use of estrogen and progestin combinations may raise serum concentrations of binding proteins (e.g., thyroid-binding globulin,corticosteroid-binding globulin), which may reduce free thyroid or corticosteroid hormone levels. Use of estrogen and progestin may also affect thelevels of sex hormone-binding globulin, and coagulation factors.Hypersensitivity Reactions: Immediately discontinue MYFEMBREE if a hypersensitivity reaction occurs.ADVERSE REACTIONSMost common adverse reactions for MYFEMBREE (incidence ≥3% and greater than placebo) were hot flush/hyperhidrosis/night sweats, abnormaluterine bleeding, alopecia, and decreased libido. These are not all the possible side effects of MYFEMBREE.DRUG INTERACTIONSP-gp Inhibitors: Avoid use of MYFEMBREE with oral P-gp inhibitors. If use is unavoidable, take MYFEMBREE first, separate dosing by at least 6hours, and monitor patients for adverse reactions.Combined P-gp and Strong CYP3A Inducers: Avoid use of MYFEMBREE with combined P-gp and strong CYP3A inducers.LACTATIONAdvise women not to breastfeed while taking MYFEMBREE.ABOUT MYOVANT SCIENCES Myovant Sciences aspires to redefine care for women and for men through purpose-driven science, empowering medicines, and transformativeadvocacy. Founded in 2016, Myovant has executed five successful Phase 3 clinical trials across oncology and women’s health leading to tworegulatory approvals by the U.S. Food and Drug Administration for men with advanced prostate cancer, women with heavy menstrual bleedingassociated with uterine fibroids, respectively. The company also has received regulatory approvals by the European Commission (EC) and the UnitedKingdom (UK) Medicines and Healthcare products Regulatory Agency for women with symptomatic uterine fibroids. Additionally, Myovant has tworegulatory submissions under review, a Marketing Authorization Application in advanced prostate cancer and a supplemental New Drug Application inendometriosis-associated pain. The Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency adopted a positiveopinion recommending the approval of ORGOVYX® (relugolix, 120 mg) for the treatment of adult patients with advanced hormone-sensitive prostatecancer. The CHMP recommendation is under review by the European Commission. Myovant is conducting a Phase 3 study to evaluate the preventionof pregnancy in women with uterine fibroids or endometriosis. Myovant is also developing MVT-602, an investigational oligopeptide kisspeptin-1receptor agonist, which has completed a Phase 2a study for female infertility as part of assisted reproduction. Sumitovant Biopharma, Ltd., a whollyowned subsidiary of Sumitomo Pharma Co., Ltd., is Myovant’s majority shareholder. For more information, please visit www.myovant.com. Follow@Myovant on Twitter and LinkedIn. ABOUT PFIZER: BREAKTHROUGHS THAT CHANGE PATIENTS’ LIVESAt Pfizer, we apply science and our global resources to bring therapies to people that extend and significantly improve their lives. We strive to set thestandard for quality, safety and value in the discovery, development and manufacture of health care products, including innovative medicines andvaccines. Every day, Pfizer colleagues work across developed and emerging markets to advance wellness, prevention, treatments and cures thatchallenge the most feared diseases of our time. Consistent with our responsibility as one of the world’s premier innovative biopharmaceuticalcompanies, we collaborate with health care providers, governments and local communities to support and expand access to reliable, affordable healthcare around the world. For more than 170 years, we have worked to make a difference for all who rely on us. We routinely post information that may beimportant to investors on our website at www.Pfizer.com.In addition, to learn more, please visit us on www.Pfizer.com and follow us on Twitter at @Pfizer and @Pfizer News, LinkedIn, YouTube and like us onFacebook at Facebook.com/Pfizer.MYOVANT FORWARD-LOOKING STATEMENTSThis press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Myovant Sciences’forward-looking statements are based on management’s current expectations and beliefs and are subject to a number of risks, uncertainties,assumptions, and other factors known and unknown that could cause actual results and the timing of certain events to differ materially from futureresults expressed or implied by the forward-looking statements. In this press release, forward-looking statements include, but are not limited to, allstatements reflecting Myovant Sciences’ plans and expectations with respect to its sNDA for MYFEMBREE for the management of moderate to severepain associated with endometriosis. Risks and uncertainties include, among other things, uncertainties regarding the commercial success ofMYFEMBREE; the uncertainties inherent in research and development, including the ability to meet anticipated clinical endpoints, commencementand/or completion dates for clinical trials, regulatory submission dates, regulatory approval dates and/or launch dates, as well as the possibility ofunfavorable new clinical data and further analyses of existing clinical data; the risk that clinical trial data are subject to differing interpretations andassessments by regulatory authorities; whether regulatory authorities will be satisfied with the design of and results from the clinical studies; whetherand when applications may be filed in any additional jurisdictions for MYFEMBREE for the management of moderate to severe pain associated withendometriosis or in any jurisdictions for any other potential indications for MYFEMBREE; whether and when the FDA may approve the sNDA forMYFEMBREE for the management of moderate to severe pain associated with endometriosis and whether and when regulatory authorities in anyjurisdictions may approve any such other applications for MYFEMBREE that may be pending or filed, which will depend on myriad factors, includingmaking a determination as to whether the product’s benefits outweigh its known risks and determination of the product’s efficacy and, if approved,whether MYFEMBREE will be commercially successful; decisions by regulatory authorities impacting labeling, manufacturing processes, safety and/orother matters that could affect the availability or commercial potential of MYFEMBREE; whether our collaboration with Pfizer will be successful;uncertainties regarding the impact of COVID-19 and the Ukraine conflict on Myovant’s business, operations and financial results; and competitivedevelopments.For a further discussion of factors that could materially affect Myovant Sciences’ operations and future prospects or which could cause actual results todiffer materially from expectations, see the risks and uncertainties listed in Myovant Sciences’ filings with the United States Securities and ExchangeCommission (SEC), including under the heading “Risk Factors” in Myovant Sciences’ Quarterly Report on Form 10-Q filed on January 26, 2022, assuch risk factors may be amended, supplemented, or superseded from time to time. These risks are not exhaustive. New risk factors emerge fromtime to time and it is not possible for Myovant Sciences’ management to predict all risk factors, nor can Myovant Sciences assess the impact of allfactors on its business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained inany forward-looking statements. You should not place undue reliance on the forward-looking statements in this press release, which speak only as ofthe date hereof, and, except as required by law, Myovant Sciences undertakes no obligation to update these forward-looking statements to reflectevents or circumstances after the date of such statements.PFIZER DISCLOSURE NOTICEThe information contained in this release is as of April 12, 2022. Pfizer assumes no obligation to update forward-looking statements contained in thisrelease as the result of new information or future events or developments.This release contains forward-looking information about MYFEMBREE® (relugolix 40 mg, estradiol 1 mg, and norethindrone acetate 0.5 mg),including a potential indication in the U.S. for the management of moderate to severe pain associated with endometriosis, including its potentialbenefits, that involves substantial risks and uncertainties that could cause actual results to differ materially from those expressed or implied by suchstatements. Risks and uncertainties include, among other things, uncertainties regarding the commercial success of MYFEMBREE; the uncertaintiesinherent in research and development, including the ability to meet anticipated clinical endpoints, commencement and/or completion dates for clinicaltrials, regulatory submission dates, regulatory approval dates and/or launch dates, as well as the possibility of unfavorable new clinical data andfurther analyses of existing clinical data; the risk that clinical trial data are subject to differing interpretations and assessments by regulatory authorities;whether regulatory authorities will be satisfied with the design of and results from the clinical studies; whether and when applications may be filed inany additional jurisdictions for MYFEMBREE for the management of moderate to severe pain associated with endometriosis or in any jurisdictions forany other potential indications for MYFEMBREE; whether and when the FDA may approve the supplemental new drug application for themanagement of moderate to severe pain associated with endometriosis and whether and when regulatory authorities in any jurisdictions may approveany such other applications for MYFEMBREE that may be pending or filed, which will depend on myriad factors, including making a determination asto whether the product’s benefits outweigh its known risks and determination of the product’s efficacy and, if approved, whether MYFEMBREE will becommercially successful; decisions by regulatory authorities impacting labeling, manufacturing processes, safety and/or other matters that could affectthe availability or commercial potential of MYFEMBREE; whether our collaboration with Myovant Sciences will be successful; uncertainties regardingthe impact of COVID-19 on Pfizer’s business, operations and financial results; and competitive developments.A further description of risks and uncertainties can be found in Pfizer’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021 andin its subsequent reports on Form 10-Q, including in the sections thereof captioned “Risk Factors” and “Forward-Looking Information and Factors ThatMay Affect Future Results”, as well as in its subsequent reports on Form 8-K, all of which are filed with the U.S. Securities and Exchange Commissionand available at www.sec.gov and www.pfizer.com.Myovant ContactsInvestor RelationsMyovant Sciences, Inc.investors@myovant.comMedia RelationsMyovant Sciences, Inc.media@myovant.comPfizer ContactsMedia Relations+1 (212) 733-1226PfizerMediaRelations@pfizer.comInvestor Relations+1 (212) 733-4848IR@pfizer.comMyovant Sciences, Inc.