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Rhythm Pharmaceuticals to Report Third Quarter 2024 Financial Results on Tuesday, November 5, 2024

RYTM 10.23.2024

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Drug:RYTM-IMCIVREE setmelanotide

Diseases:obesity

Date of Upcoming Event:2024-11-05

Name of Upcoming Event:ObesityWeek®

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--Five posters to be presented atObesityWeek^®--

BOSTON,Oct. 23, 2024(GLOBE NEWSWIRE) --Rhythm Pharmaceuticals, Inc.(Nasdaq: RYTM), a commercial-stage biopharmaceutical company focused on transforming the lives of patients living with rare neuroendocrine diseases, today announced that it will host a live conference call and webcast at5:00 p.m. ETonTuesday, November 5, 2024to report its third quarter 2024 financial results and provide a corporate update. The conference call will be hosted live from The Obesity Society’s Annual Meeting, ObesityWeek^®inSan Antonio, TX.

To access the live conference call, participants may registerhere. While not required, it is recommended that participants join the call ten minutes prior to the scheduled start. A webcast of the call will also be available under "Events and Presentations" in the Investor Relations section of theRhythm Pharmaceuticalswebsite athttp://ir.rhythmtx.com/. The archived webcast will be available on Rhythm’s website approximately two hours after it concludes and will be available for 30 days following the call.

The Company also announced today that Rhythm and its collaborators will deliver five poster presentations at The Obesity Society’s Annual Meeting, ObesityWeek^®, which is being heldNovember 3-6, 2024inSan Antonio, TX.All Rhythm or setmelanotide-related posters are scheduled to be presented onTuesday, November 5:

Weight Loss at 18 Months of Setmelanotide in 2- to <6-Year-Old Patients with Rare MC4R Pathway Diseases;
Body Composition Improvements After 12 Months of Setmelanotide in Acquired Hypothalamic Obesity;
Risk Factors Correlating with MC4R Pathway Variants on Genetic Testing;
DAYBREAK Trial: Setmelanotide vs Placebo in Patients with Melanocortin-4 Receptor Pathway Variants; and
3-Month Real-World Setmelanotide Hunger and Weight Outcomes in Patients with Hypothalamic Obesity.

About Rhythm PharmaceuticalsRhythm is a commercial-stage biopharmaceutical company committed to transforming the lives of patients and their families living with rare neuroendocrine diseases. Rhythm’s lead asset, IMCIVREE^®(setmelanotide), an MC4R agonist designed to treat hyperphagia and severe obesity, is approved by theU.S. Food and Drug Administration(FDA) for chronic weight management in adult and pediatric patients 6 years of age and older with monogenic or syndromic obesity due to pro-opiomelanocortin (POMC), proprotein convertase subtilisin/kexin type 1 (PCSK1) or leptin receptor (LEPR) deficiency confirmed by genetic testing, or patients with a clinical diagnosis of Bardet-Biedl syndrome (BBS). Both theEuropean Commission(EC) and the UK’sMedicines & Healthcare Products Regulatory Agency(MHRA) have authorized setmelanotide for the treatment of obesity and the control of hunger associated with genetically confirmed BBS or genetically confirmed loss-of-function biallelic POMC, including PCSK1, deficiency or biallelic LEPR deficiency in adults and children 6 years of age and above. Additionally, Rhythm is advancing a broad clinical development program for setmelanotide in other rare diseases, as well as investigational MC4R agonists LB54640 andRM-718, and a preclinical suite of small molecules for the treatment of congenital hyperinsulinism. Rhythm’s headquarters is inBoston, MA.

Setmelanotide IndicationInthe United States, setmelanotide is indicated for chronic weight management in adult and pediatric patients 6 years of age and older with monogenic or syndromic obesity due to POMC, PCSK1 or LEPR deficiency as determined by an FDA-approved test demonstrating variants inPOMC,PCSK1orLEPRgenes that are interpreted as pathogenic, likely pathogenic, or of uncertain significance (VUS) or BBS.

In theEuropean Union, setmelanotide is indicated for the treatment of obesity and the control of hunger associated with genetically confirmed BBS or loss-of-function biallelic POMC, including PCSK1, deficiency or biallelic LEPR deficiency in adults and children 2 years of age and above. InEurope, setmelanotide should be prescribed and supervised by a physician with expertise in obesity with underlying genetic etiology.

Limitations of UseSetmelanotide is not indicated for the treatment of patients with the following conditions as setmelanotide would not be expected to be effective:

Obesity due to suspected POMC, PCSK1 or LEPR deficiency withPOMC,PCSK1orLEPRvariants classified as benign or likely benign
Other types of obesity not related to POMC, PCSK1 or LEPR deficiency, or BBS, including obesity associated with other genetic syndromes and general (polygenic) obesity.

ContraindicationPrior serious hypersensitivity to setmelanotide or any of the excipients in IMCIVREE. Serious hypersensitivity reactions (e.g., anaphylaxis) have been reported.

WARNINGS AND PRECAUTIONS

Skin Pigmentation and Darkening of Pre-Existing Nevi: Generalized increased skin pigmentation and darkening of pre-existing nevi have occurred because of its pharmacologic effect. Full body skin examinations prior to initiation and periodically during treatment should be conducted to monitor pre-existing and new pigmentary lesions.

Heart rate and blood pressure monitoring:InEurope, heart rate and blood pressure should be monitored as part of standard clinical practice at each medical visit (at least every 6 months) for patients treated with setmelanotide.

Disturbance in Sexual Arousal:Spontaneous penile erections in males and sexual adverse reactions in females have occurred. Patients who have an erection lasting longer than 4 hours should seek emergency medical attention.

Depression and Suicidal Ideation: Depression and suicidal ideation have occurred. Patients should be monitored for new onset or worsening depression or suicidal thoughts or behaviors. Consideration should be given to discontinuing setmelanotide if patients experience suicidal thoughts or behaviors, or clinically significant or persistent depression symptoms occur.

Hypersensitivity Reactions: Serious hypersensitivity reactions (e.g., anaphylaxis) have been reported. If suspected, advise patients to promptly seek medical attention and discontinue setmelanotide.

Pediatric Population:The prescribing physician should periodically assess response to setmelanotide therapy. In growing children, the impact of weight loss on growth and maturation should be evaluated. InEurope, the prescribing physician should monitor growth (height and weight) using age- and sex-appropriate growth curves.

Risk of Serious Adverse Reactions Due to Benzyl Alcohol Preservative in Neonates and Low Birth Weight Infants:Setmelanotide is not approved for use in neonates or infants. Serious and fatal adverse reactions including “gasping syndrome” can occur in neonates and low birth weight infants treated with benzyl alcohol-preserved drugs.

ADVERSE REACTIONSMost common adverse reactions (incidence ≥20%) included skin hyperpigmentation, injection site reactions, nausea, headache, diarrhea, abdominal pain, vomiting, depression, and spontaneous penile erection.

USE IN SPECIFIC POPULATIONS

Lactation:Not recommended when breastfeeding.To report SUSPECTED ADVERSE REACTIONS, contactRhythm Pharmaceuticalsat +1 (833) 789-6337 or FDA at 1-800-FDA-1088 orwww.fda.gov/medwatch. See section 4.8 of theSummary of Product Characteristicsfor information on reporting suspected adverse reactions in Europe.

Please see the full Prescribing Information for additional Important Safety Information.Forward-looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release that do not relate to matters of historical fact should be considered forward-looking statements, including without limitation statements regarding the release of our financial results and our participation in upcoming events and presentations, and the date, time, and content thereof, including at the Obesity Society’s Annual Meeting and our participation in the presentation of Rhythm or setmelanotide-related posters. Statements using words such as “expect”, “anticipate”, “believe”, “may”, “will” and similar terms are also forward-looking statements. Such statements are subject to numerous risks and uncertainties, including, but not limited to, our ability to enroll patients in clinical trials, the design and outcome of clinical trials, the impact of competition, the ability to achieve or obtain necessary regulatory approvals, risks associated with data analysis and reporting, our ability to successfully commercialize setmelanotide, our liquidity and expenses, our ability to retain our key employees and consultants, and to attract, retain and motivate qualified personnel, and general economic conditions, and the other important factors discussed under the caption “Risk Factors” in Quarterly Report on Form 10-Q for the three months endedJune 30, 2024and our other filings with theSecurities and Exchange Commission. Except as required by law, we undertake no obligations to make any revisions to the forward-looking statements contained in this release or to update them to reflect events or circumstances occurring after the date of this release, whether as a result of new information, future developments or otherwise.

Corporate Contact:David ConnollyHead of Investor Relations and Corporate CommunicationsRhythm Pharmaceuticals, Inc.857-264-4280dconnolly@rhythmtx.com

Media Contact:

Sheryl SeapyReal Chemistry(949) 903-4750sseapy@realchemistry.com

Source: Rhythm Pharmaceuticals, Inc.

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