US FDA Prolongs Evaluation of Rhythm's Treatment for Obesity Linked to Brain Damage
Written by Emily J. Thompson, Senior Investment Analyst
Updated: Nov 07 2025
0mins
Should l Buy RYTM?
Source: Reuters
FDA Review Extension: The FDA has extended the review period for Rhythm Pharmaceuticals' drug Imcivree, aimed at treating a rare form of obesity, by three months, moving the deadline from December 20, 2025, to March 20, 2026.
Company Response: CEO David Meeker expressed disappointment over the unexpected extension, noting that the FDA requested additional sensitivity analyses of efficacy data from a late-stage trial without any new safety or manufacturing data.
Trial Results: Imcivree showed significant weight reduction in patients with acquired hypothalamic obesity during a late-stage trial involving 120 participants, reinforcing confidence in the drug's efficacy.
Market Potential: Analysts believe that while approval for treating hypothalamic obesity is likely, the market uptake may be modest, with an estimated 10,000 patients in the U.S. affected by the condition.
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Analyst Views on RYTM
Wall Street analysts forecast RYTM stock price to rise
15 Analyst Rating
14 Buy
1 Hold
0 Sell
Strong Buy
Current: 88.120
Low
123.00
Averages
140.62
High
167.00
Current: 88.120
Low
123.00
Averages
140.62
High
167.00
About RYTM
Rhythm Pharmaceuticals, Inc. is a commercial-stage biopharmaceutical company. The Company's lead asset, IMCIVREE, is an MC4R agonist designed to treat hyperphagia and severe obesity, is approved by the Food and Drug Administration (FDA) to reduce excess body weight and maintain reduction long term in adults and pediatric patients aged four years and older with acquired hypothalamic obesity, adult and pediatric patients two years of age and older with syndromic or monogenic obesity due to Bardet-Biedl syndrome (BBS) or genetically confirmed pro-opiomelanocortin (POMC), including proprotein convertase subtilisin/kexin type 1 (PCSK1), deficiency or leptin receptor (LEPR) deficiency. In addition to it the Company is advancing a broad clinical development program for setmelanotide in other rare diseases, as well as investigational MC4R agonists bivamelagon and RM-718, and a preclinical suite of small molecules for the treatment of congenital hyperinsulinism.
About the author
Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.
Rhythm Pharmaceuticals Gains FDA Approval for Expanded Market
- Market Expansion Opportunity: Rhythm Pharmaceuticals' Imcivree, approved in 2020 for chronic obesity treatment due to specific protein deficiencies, achieved $189.8 million in sales for 2025, reflecting a nearly 46% year-over-year growth, indicating strong market demand and growth potential.
- FDA New Approval: On March 19, 2023, Rhythm Pharmaceuticals announced that the FDA granted approval for Imcivree for patients with acquired hypothalamic obesity, potentially adding 10,000 patients and expanding the target market from 7,500 to 17,500, significantly enhancing market coverage.
- Clinical Trial Risks: Despite the new indication, Imcivree failed to meet its primary endpoint in a phase 3 trial for obesity treatment in patients with certain genetic conditions, increasing uncertainty around future approvals and potentially impacting the company's market outlook.
- Profitability Challenges: Rhythm Pharmaceuticals faces ongoing profitability risks and intense competition in a small market; while there are other pipeline candidates, the overall profit outlook remains unclear, necessitating cautious risk assessment by investors.
See More
Rhythm Pharmaceuticals Receives EMA Support for Imcivree Label Expansion
- Label Expansion Approval: Rhythm Pharmaceuticals announced that its lead asset, Imcivree (setmelanotide), received endorsement from the EMA expert panel for label expansion to treat acquired hypothalamic obesity, marking a significant advancement in the company's obesity treatment portfolio.
- Expanded Indication: Currently approved in the EU and UK for obesity due to rare genetic disorders like Bardet-Biedl syndrome, the EMA's positive opinion recommends its use for patients aged 4 and older with acquired obesity due to hypothalamic injury, highlighting its potential in a new indication.
- Regulatory Process Progress: The CHMP's decision will be reviewed by the European Commission, with a final marketing authorization expected in Q2 2026, paving the way for Rhythm Pharmaceuticals' market expansion efforts.
- Optimistic Market Outlook: With the indication expansion for Imcivree, Rhythm Pharmaceuticals is poised to capture a larger share of the obesity treatment market, particularly as demand for therapies targeting acquired obesity continues to rise, enhancing the company's strategic position.
See More
Rhythm Pharmaceuticals Receives Positive EMA Opinion for IMCIVREE Expansion
- Positive EMA Opinion: Rhythm Pharmaceuticals announced that the European Medicines Agency's (EMA) Committee has adopted a positive opinion recommending the expansion of IMCIVREE® (setmelanotide) marketing authorization to include treatment for obesity and hunger control in individuals aged 4 and above with hypothalamic injury, which is expected to significantly enhance the company's market share in this area.
- Follow-Up to FDA Approval: Following closely on the heels of FDA approval, the EMA's positive opinion further validates the quality of Rhythm's data in the hypothalamic obesity space, indicating the company's strategic positioning and execution capabilities in global drug development, potentially driving future sales growth.
- Significant Market Need: Rhythm estimates that there are approximately 10,000 patients with acquired hypothalamic obesity in both the U.S. and EU, highlighting a substantial unmet medical need, and the expanded authorization for IMCIVREE will provide the company with a unique market opportunity.
- Future Decision Anticipation: The European Commission is expected to make a final decision in the second quarter of 2026, and if approved, this could provide Rhythm with a new revenue stream and potentially impact its competitive position in the global market.
See More
PANTHERx Selected as Exclusive U.S. Pharmacy Partner for IMCIVREE Distribution
- Exclusive Partnership: PANTHERx Rare Pharmacy has been selected by Rhythm Pharmaceuticals as the exclusive U.S. pharmacy distribution partner for IMCIVREE®, focusing on acquired hypothalamic obesity treatment, marking a significant expansion in the rare disease sector.
- Personalized Patient Support: PANTHERx will leverage its industry-leading RxARECARE® model to provide therapy-specific clinical expertise to patients, caregivers, and prescribers, making complex rare disease therapies more accessible through individualized case management and comprehensive financial and insurance navigation.
- Historic Milestone: The new indication for IMCIVREE offers crucial treatment options for patients with acquired hypothalamic obesity, with CEO Bansi Nagji highlighting its significance as a scientific milestone for affected individuals and families, demonstrating the company's commitment to high-touch clinical support.
- Industry Leadership: Since 2020, PANTHERx has served as the exclusive pharmacy partner for IMCIVREE in chronic weight management, further solidifying its position as the largest independent rare pharmacy in the U.S., showcasing its expertise and innovation in the rare disease field.
See More
PANTHERx Selected as Exclusive U.S. Pharmacy Partner for IMCIVREE Distribution
- Exclusive Partnership: PANTHERx Rare Pharmacy has been selected by Rhythm Pharmaceuticals as the exclusive U.S. pharmacy distribution partner for IMCIVREE, focusing on acquired hypothalamic obesity, which marks a significant expansion in the company's rare disease portfolio and is expected to enhance its market share and brand influence.
- Personalized Patient Support: PANTHERx will leverage its industry-leading RxARECARE® model to provide personalized clinical support and education to patients, caregivers, and prescribers, aiming to simplify the complex treatment processes associated with rare diseases and improve patient adherence and satisfaction.
- Historic Milestone: The new indication for IMCIVREE offers crucial treatment options for patients with acquired hypothalamic obesity, with CEO Bansi Nagji highlighting that this advancement brings hope to affected individuals and families, further solidifying the company's leadership in rare disease therapies.
- Industry Recognition: Since 2020, PANTHERx has been the exclusive pharmacy partner for IMCIVREE, focusing on obesity related to conditions like Bardet-Biedl Syndrome, and the company's successful track record and expertise will provide robust support for the promotion of this new indication.
See More
U.S. Stocks Decline Amid Rising Energy Costs and Inflation Fears
- Market Decline: The S&P 500 Index fell by 0.88% and the Nasdaq 100 Index dropped by 1.22%, both reaching 3.75-month lows, indicating market concerns over rising energy costs potentially impacting economic growth and inflation.
- Rising Bond Yields: The 10-year Treasury note yield rose to 4.38%, a 7.5-month high, reflecting market fears that surging energy prices from the Iran conflict will boost inflation and may force the Fed to tighten monetary policy.
- Escalating International Tensions: The Iran war has entered its 21st day with attacks on neighboring countries, leading Kuwait to shut down refinery units and Saudi Arabia and the UAE intercepting Iranian missiles, worsening market sentiment and increasing investor anxiety.
- Increased Market Volatility: With the quarterly triple witching event, approximately $5.7 trillion in options and derivatives are set to expire, potentially heightening market volatility and further intensifying investor unease.
See More
Rhythm Pharmaceuticals Gains FDA Approval for Expanded Market
- Market Expansion Opportunity: Rhythm Pharmaceuticals' Imcivree, approved in 2020 for chronic obesity treatment due to specific protein deficiencies, achieved $189.8 million in sales for 2025, reflecting a nearly 46% year-over-year growth, indicating strong market demand and growth potential.
- FDA New Approval: On March 19, 2023, Rhythm Pharmaceuticals announced that the FDA granted approval for Imcivree for patients with acquired hypothalamic obesity, potentially adding 10,000 patients and expanding the target market from 7,500 to 17,500, significantly enhancing market coverage.
- Clinical Trial Risks: Despite the new indication, Imcivree failed to meet its primary endpoint in a phase 3 trial for obesity treatment in patients with certain genetic conditions, increasing uncertainty around future approvals and potentially impacting the company's market outlook.
- Profitability Challenges: Rhythm Pharmaceuticals faces ongoing profitability risks and intense competition in a small market; while there are other pipeline candidates, the overall profit outlook remains unclear, necessitating cautious risk assessment by investors.
See More
Rhythm Pharmaceuticals Receives EMA Support for Imcivree Label Expansion
- Label Expansion Approval: Rhythm Pharmaceuticals announced that its lead asset, Imcivree (setmelanotide), received endorsement from the EMA expert panel for label expansion to treat acquired hypothalamic obesity, marking a significant advancement in the company's obesity treatment portfolio.
- Expanded Indication: Currently approved in the EU and UK for obesity due to rare genetic disorders like Bardet-Biedl syndrome, the EMA's positive opinion recommends its use for patients aged 4 and older with acquired obesity due to hypothalamic injury, highlighting its potential in a new indication.
- Regulatory Process Progress: The CHMP's decision will be reviewed by the European Commission, with a final marketing authorization expected in Q2 2026, paving the way for Rhythm Pharmaceuticals' market expansion efforts.
- Optimistic Market Outlook: With the indication expansion for Imcivree, Rhythm Pharmaceuticals is poised to capture a larger share of the obesity treatment market, particularly as demand for therapies targeting acquired obesity continues to rise, enhancing the company's strategic position.
See More
Rhythm Pharmaceuticals Receives Positive EMA Opinion for IMCIVREE Expansion
- Positive EMA Opinion: Rhythm Pharmaceuticals announced that the European Medicines Agency's (EMA) Committee has adopted a positive opinion recommending the expansion of IMCIVREE® (setmelanotide) marketing authorization to include treatment for obesity and hunger control in individuals aged 4 and above with hypothalamic injury, which is expected to significantly enhance the company's market share in this area.
- Follow-Up to FDA Approval: Following closely on the heels of FDA approval, the EMA's positive opinion further validates the quality of Rhythm's data in the hypothalamic obesity space, indicating the company's strategic positioning and execution capabilities in global drug development, potentially driving future sales growth.
- Significant Market Need: Rhythm estimates that there are approximately 10,000 patients with acquired hypothalamic obesity in both the U.S. and EU, highlighting a substantial unmet medical need, and the expanded authorization for IMCIVREE will provide the company with a unique market opportunity.
- Future Decision Anticipation: The European Commission is expected to make a final decision in the second quarter of 2026, and if approved, this could provide Rhythm with a new revenue stream and potentially impact its competitive position in the global market.
See More
PANTHERx Selected as Exclusive U.S. Pharmacy Partner for IMCIVREE Distribution
- Exclusive Partnership: PANTHERx Rare Pharmacy has been selected by Rhythm Pharmaceuticals as the exclusive U.S. pharmacy distribution partner for IMCIVREE®, focusing on acquired hypothalamic obesity treatment, marking a significant expansion in the rare disease sector.
- Personalized Patient Support: PANTHERx will leverage its industry-leading RxARECARE® model to provide therapy-specific clinical expertise to patients, caregivers, and prescribers, making complex rare disease therapies more accessible through individualized case management and comprehensive financial and insurance navigation.
- Historic Milestone: The new indication for IMCIVREE offers crucial treatment options for patients with acquired hypothalamic obesity, with CEO Bansi Nagji highlighting its significance as a scientific milestone for affected individuals and families, demonstrating the company's commitment to high-touch clinical support.
- Industry Leadership: Since 2020, PANTHERx has served as the exclusive pharmacy partner for IMCIVREE in chronic weight management, further solidifying its position as the largest independent rare pharmacy in the U.S., showcasing its expertise and innovation in the rare disease field.
See More
PANTHERx Selected as Exclusive U.S. Pharmacy Partner for IMCIVREE Distribution
- Exclusive Partnership: PANTHERx Rare Pharmacy has been selected by Rhythm Pharmaceuticals as the exclusive U.S. pharmacy distribution partner for IMCIVREE, focusing on acquired hypothalamic obesity, which marks a significant expansion in the company's rare disease portfolio and is expected to enhance its market share and brand influence.
- Personalized Patient Support: PANTHERx will leverage its industry-leading RxARECARE® model to provide personalized clinical support and education to patients, caregivers, and prescribers, aiming to simplify the complex treatment processes associated with rare diseases and improve patient adherence and satisfaction.
- Historic Milestone: The new indication for IMCIVREE offers crucial treatment options for patients with acquired hypothalamic obesity, with CEO Bansi Nagji highlighting that this advancement brings hope to affected individuals and families, further solidifying the company's leadership in rare disease therapies.
- Industry Recognition: Since 2020, PANTHERx has been the exclusive pharmacy partner for IMCIVREE, focusing on obesity related to conditions like Bardet-Biedl Syndrome, and the company's successful track record and expertise will provide robust support for the promotion of this new indication.
See More
U.S. Stocks Decline Amid Rising Energy Costs and Inflation Fears
- Market Decline: The S&P 500 Index fell by 0.88% and the Nasdaq 100 Index dropped by 1.22%, both reaching 3.75-month lows, indicating market concerns over rising energy costs potentially impacting economic growth and inflation.
- Rising Bond Yields: The 10-year Treasury note yield rose to 4.38%, a 7.5-month high, reflecting market fears that surging energy prices from the Iran conflict will boost inflation and may force the Fed to tighten monetary policy.
- Escalating International Tensions: The Iran war has entered its 21st day with attacks on neighboring countries, leading Kuwait to shut down refinery units and Saudi Arabia and the UAE intercepting Iranian missiles, worsening market sentiment and increasing investor anxiety.
- Increased Market Volatility: With the quarterly triple witching event, approximately $5.7 trillion in options and derivatives are set to expire, potentially heightening market volatility and further intensifying investor unease.
See More
