Bristol Myers Squibb Provides Update on Phase 3 ODYSSEY-HCM Trial

Rhea-AI Summary

Bristol Myers Squibb (NYSE: BMY) announced that its Phase 3 ODYSSEY-HCM trial for Camzyos (mavacamten) did not meet its dual primary endpoints in treating non-obstructive hypertrophic cardiomyopathy (nHCM). The trial, which enrolled 580 adult patients, evaluated changes in Kansas City Cardiomyopathy Questionnaire scores and peak oxygen consumption at Week 48 compared to placebo.

No new safety signals were observed during the trial. While these results are disappointing for nHCM treatment, the company emphasized that these findings do not impact Camzyos's established benefits for obstructive HCM patients, where it has demonstrated favorable outcomes in clinical trials and real-world evidence across more than 50 countries.

Positive

• No new safety concerns identified for Camzyos
• Existing approvals and efficacy for obstructive HCM remain unchanged across 50+ countries

Negative

• Failed to meet both primary endpoints in Phase 3 ODYSSEY-HCM trial
• No demonstrated efficacy for non-obstructive HCM treatment
• Potential loss of market expansion opportunity in nHCM indication

Insights

Clinical Trial Specialist

Bristol Myers Squibb's Phase 3 ODYSSEY-HCM trial failure represents a significant clinical setback in the company's attempt to expand Camzyos (mavacamten) into the non-obstructive hypertrophic cardiomyopathy (nHCM) patient population. This 580-patient trial failed to meet both primary endpoints - the Kansas City Cardiomyopathy Questionnaire scores and peak oxygen consumption - critical measures of symptomatic improvement and functional capacity.

The trial results establish a clear clinical distinction between obstructive and non-obstructive HCM, which appear to respond differently to cardiac myosin inhibition despite their apparent similarities. This represents a critical scientific finding that cardiac myosin inhibitors like Camzyos may not produce the same benefits across the spectrum of HCM variants.

This outcome effectively closes the door on expanding Camzyos into the nHCM market in the near term, limiting the drug's total addressable patient population. For patients with non-obstructive HCM, this means continued lack of disease-modifying treatment options, highlighting an ongoing unmet medical need.

The trial's duration and size make these results particularly definitive. The lack of new safety signals at least preserves Camzyos's established safety profile for its currently approved indication in obstructive HCM, preventing any potential negative regulatory implications for its existing market.

Pharmaceutical Portfolio Analyst

This Phase 3 failure directly impacts BMY's cardiovascular portfolio expansion strategy for Camzyos, which was approved in 2022 for obstructive HCM. The unsuccessful ODYSSEY-HCM trial eliminates an important potential label expansion opportunity that would have significantly broadened the drug's commercial potential.

While BMY has carefully messaged that these results don't affect Camzyos's established position in obstructive HCM, the inability to penetrate the non-obstructive HCM market represents a concrete ceiling on the drug's growth trajectory. With a market cap of $101.6 billion, BMY relies on successful label expansions of existing assets to drive growth as the company faces patent cliffs elsewhere in its portfolio.

The trial results highlight the challenging nature of cardiovascular drug development, where mechanistic understanding doesn't always translate across seemingly related conditions. BMY's emphasis on the trial contributing to "scientific understanding" appears to be messaging aimed at softening the negative impact of these results.

This setback follows a pattern of mixed clinical results in BMY's portfolio and may raise questions about the company's ability to maximize the value of Camzyos, which was acquired through its $13.1 billion MyoKardia acquisition in 2020. For investors, this represents a partial impairment of the strategic rationale behind that acquisition, though Camzyos's approved indication in obstructive HCM still provides value.

PRINCETON, N.J.--(BUSINESS WIRE)-- Bristol Myers Squibb (NYSE: BMY) today announced the Phase 3 ODYSSEY-HCM trial evaluating Camzyos (mavacamten) for the treatment of adult patients with symptomatic New York Heart Association (NYHA) class II-III non-obstructive hypertrophic cardiomyopathy (nHCM) did not meet its dual primary endpoints of changes from baseline to Week 48 compared to placebo in the Kansas City Cardiomyopathy Questionnaire – Clinical Summary Score (KCCQ-23 CSS) and peak oxygen consumption (pVO2). No new safety signals were observed.

“The ODYSSEY-HCM trial, the largest and longest-duration study completed to date in patients with non-obstructive HCM, tested the hypothesis of whether a cardiac myosin inhibitor would improve measures of feel and function for these patients, showing clinical benefits similar to what we have seen in obstructive HCM,” said Milind Desai, MD, MBA, Vice Chair in the Heart, Vascular & Thoracic Institute and Director of the HCM Center, Cleveland Clinic. “The findings of this trial help us understand that obstructive HCM and non-obstructive HCM are two unique diseases. Through long-term trials and real-world data from thousands of patients with symptomatic obstructive HCM, we have seen the meaningful impact that Camzyos has on improving the quality of life for patients living with this condition. ODYSSEY-HCM indicates that we must consider new ways of thinking about potential treatment approaches for non-obstructive HCM. We want to thank the patients and investigators for their efforts in completing this important trial and their commitment to advancing the scientific understanding of this complex disease.”

“While these results are disappointing, the ODYSSEY-HCM trial meaningfully contributes to the understanding of non-obstructive HCM, a disease where there remains a significant need for new treatment options,” said Roland Chen, MD, senior vice president, drug development, Immunology and Cardiovascular Medicines, Bristol Myers Squibb. “These findings represent the first Phase 3 clinical trial data for a cardiac myosin inhibitor in non-obstructive HCM. Importantly, these results do not change the favorable benefit-risk profile that has been consistently demonstrated across our Camzyos clinical trials in obstructive HCM and the robust body of real-world effectiveness and safety evidence showing its benefit for people living with obstructive HCM around the world.”

Bristol Myers Squibb will work with key investigators to share detailed results with the scientific community in the future.

Bristol Myers Squibb thanks the patients and investigators who participated in the ODYSSEY-HCM clinical trial.

About ODYSSEY-HCM
ODYSSEY-HCM (NCT05582395) is a Phase 3 randomized, double-blind, placebo-controlled trial that enrolled 580 adult patients with symptomatic (NYHA class II or III) non-obstructive hypertrophic cardiomyopathy (nHCM) worldwide.

The dual-primary endpoints for the trial were to examine changes from baseline in Kansas City Cardiomyopathy Questionnaire Clinical Summary Score (KCCQ-23 CSS) and peak oxygen consumption (pVO2) at Week 48. Secondary endpoints included change from baseline in ventilatory efficiency (VE/VCO2), NYHA functional class, N-terminal pro B-type natriuretic peptide (NT-proBNP) levels, and the Hypertrophic Cardiomyopathy Symptom Questionnaire-Shortness of Breath (HCMSQ-SoB) at Week 48.

About CAMZYOS^® (mavacamten)
CAMZYOS^® (mavacamten) is the first and only cardiac myosin inhibitor approved in the U.S., indicated for the treatment of adults with symptomatic New York Heart Association (NYHA) class II-III obstructive hypertrophic cardiomyopathy (oHCM) to improve functional capacity and symptoms, and in the European Union, indicated for the treatment of symptomatic (NYHA, class II-III) oHCM in adult patients. It has also received regulatory approvals in more than 50 countries and regions across five continents. CAMZYOS is a selective, reversible, allosteric inhibitor of cardiac myosin. CAMZYOS modulates the number of myosin heads that can enter “on actin” (power-generating) states, thus reducing the probability of force-producing (systolic) and residual (diastolic) cross-bridge formation. Excess myosin actin cross-bridge formation and dysregulation of the super-relaxed state are mechanistic hallmarks of HCM. CAMZYOS shifts the overall myosin population towards an energy-sparing, recruitable, super-relaxed state. In oHCM patients, myosin inhibition with CAMZYOS reduces dynamic left ventricular outflow tract (LVOT) obstruction and improves cardiac filling pressures. These effects on the heart translate to improvement in symptoms and ability to be active in symptomatic patients with oHCM.

CAMZYOS U.S. INDICATION
CAMZYOS^® (mavacamten) is a cardiac myosin inhibitor indicated for the treatment of adults with symptomatic New York Heart Association (NYHA) class II-III obstructive hypertrophic cardiomyopathy (HCM) to improve functional capacity and symptoms.

IMPORTANT SAFETY INFORMATION

WARNING: RISK OF HEART FAILURE

CAMZYOS reduces left ventricular ejection fraction (LVEF) and can cause heart failure due to systolic dysfunction.

Echocardiogram assessments of LVEF are required prior to and during treatment with CAMZYOS. Initiation of CAMZYOS in patients with LVEF <55% is not recommended. Interrupt CAMZYOS if LVEF is <50% at any visit or if the patient experiences heart failure symptoms or worsening clinical status.

Concomitant use of CAMZYOS with certain cytochrome P450 inhibitors or discontinuation of certain cytochrome P450 inducers may increase the risk of heart failure due to systolic dysfunction; therefore, the use of CAMZYOS is contraindicated with the following:

• Moderate to strong CYP2C19 inhibitors or strong CYP3A4 inhibitors
• Moderate to strong CYP2C19 inducers or moderate to strong CYP3A4 inducers

Because of the risk of heart failure due to systolic dysfunction, CAMZYOS is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS) called the CAMZYOS REMS PROGRAM.

CONTRAINDICATIONS

CAMZYOS is contraindicated with concomitant use of:

• Moderate to strong CYP2C19 inhibitors or strong CYP3A4 inhibitors
• Moderate to strong CYP2C19 inducers or moderate to strong CYP3A4 inducers

WARNINGS AND PRECAUTIONS

Heart Failure

CAMZYOS reduces systolic contraction and can cause heart failure or totally block ventricular function. Patients who experience a serious intercurrent illness (e.g., serious infection) or arrhythmia (e.g., atrial fibrillation or other uncontrolled tachyarrhythmia) are at greater risk of developing systolic dysfunction and heart failure.

Assess the patient’s clinical status and LVEF prior to and regularly during treatment and adjust the CAMZYOS dose accordingly. New or worsening arrhythmia, dyspnea, chest pain, fatigue, palpitations, leg edema, or elevations in N-terminal pro-B-type natriuretic peptide (NT-proBNP) may be signs and symptoms of heart failure and should also prompt an evaluation of cardiac function.

Asymptomatic LVEF reduction, intercurrent illnesses, and arrhythmias require additional dosing considerations.

Initiation of CAMZYOS in patients with LVEF <55% is not recommended. Avoid concomitant use of CAMZYOS in patients on disopyramide, ranolazine, verapamil with a beta blocker, or diltiazem with a beta blocker as these medications and combinations increase the risk of left ventricular systolic dysfunction and heart failure symptoms and clinical experience is limited.

CYP 450 Drug Interactions Leading to Heart Failure or Loss of Effectiveness

CAMZYOS is primarily metabolized by CYP2C19 and CYP3A4 enzymes. Concomitant use of CAMZYOS and drugs that interact with these enzymes may lead to life-threatening drug interactions such as heart failure or loss of effectiveness.

Advise patients of the potential for drug interactions, including with over-the-counter medications (such as omeprazole, esomeprazole, or cimetidine). Advise patients to inform their healthcare provider of all concomitant products prior to and during CAMZYOS treatment.

CAMZYOS Risk Evaluation and Mitigation Strategy (REMS) Program

CAMZYOS is only available through a restricted program called the CAMZYOS REMS Program because of the risk of heart failure due to systolic dysfunction. Notable requirements of the CAMZYOS REMS Program include the following:

• Prescribers must be certified by enrolling in the REMS Program.
• Patients must enroll in the REMS Program and comply with ongoing monitoring requirements.
• Pharmacies must be certified by enrolling in the REMS Program and must only dispense to patients who are authorized to receive CAMZYOS.
• Wholesalers and distributors must only distribute to certified pharmacies.

Further information is available at www.CAMZYOSREMS.com or by telephone at 1-833-628-7367.

Embryo-Fetal Toxicity

CAMZYOS may cause fetal toxicity when administered to a pregnant female, based on animal studies. Confirm absence of pregnancy in females of reproductive potential prior to treatment and advise patients to use effective contraception during treatment with CAMZYOS and for 4 months after the last dose. CHCs containing a combination of ethinyl estradiol and norethindrone may be used with CAMZYOS. However, CAMZYOS may reduce the effectiveness of combined hormonal contraceptives (CHC). If these CHCs are used, advise patients to add nonhormonal contraception (such as condoms) during concomitant use and for 4 months after the last dose of CAMZYOS.

ADVERSE REACTIONS

In the EXPLORER-HCM trial, adverse reactions occurring in >5% of patients and more commonly in the CAMZYOS group than in the placebo group were dizziness (27% vs 18%) and syncope (6% vs 2%). There were no new adverse reactions identified in VALOR-HCM.

Effects on Systolic Function

In the EXPLORER-HCM trial, mean (SD) resting LVEF was 74% (6) at baseline in both treatment groups. Mean (SD) absolute change from baseline in LVEF was -4% (8) in the CAMZYOS group and 0% (7) in the placebo group over the 30-week treatment period. At Week 38, following an 8-week interruption of trial drug, mean LVEF was similar to baseline for both treatment groups. In the EXPLORER-HCM trial, 7 (6%) patients in the CAMZYOS group and 2 (2%) patients in the placebo group experienced reversible reductions in LVEF <50% (median 48%: range 35-49%) while on treatment. In all 7 patients treated with CAMZYOS, LVEF recovered following interruption of CAMZYOS.

DRUG INTERACTIONS

Potential for Other Drugs to Affect Plasma Concentrations of CAMZYOS

CAMZYOS is primarily metabolized by CYP2C19 and to a lesser extent by CYP3A4 and CYP2C9. Inducers and inhibitors of CYP2C19 and moderate to strong inhibitors or inducers of CYP3A4 may affect the exposures of CAMZYOS.

Impact of Other Drugs on CAMZYOS:

• Moderate to Strong CYP2C19 Inhibitors or Strong CYP3A4 Inhibitors: Concomitant use increases CAMZYOS exposure, which may increase the risk of heart failure due to systolic dysfunction. Concomitant use is contraindicated.
• Moderate to Strong CYP2C19 Inducers or Moderate to Strong CYP3A4 Inducers: Concomitant use decreases CAMZYOS exposure, which may reduce CAMZYOS’ efficacy. The risk of heart failure due to systolic dysfunction may increase with discontinuation of these inducers as the levels of induced enzyme normalizes. Concomitant use is contraindicated.
• Weak CYP2C19 Inhibitors or Moderate CYP3A4 Inhibitors: Concomitant use with a weak CYP2C19 inhibitor or a moderate CYP3A4 inhibitor increases CAMZYOS exposure, which may increase the risk of adverse drug reactions. Initiate CAMZYOS at the recommended starting dose of 5 mg orally once daily in patients who are on stable therapy with a weak CYP2C19 inhibitor or a moderate CYP3A4 inhibitor. Reduce dose of CAMZYOS by one level (i.e., 15 to 10 mg, 10 to 5 mg, or 5 to 2.5 mg) in patients who are on CAMZYOS treatment and intend to initiate a weak CYP2C19 inhibitor or a moderate CYP3A4 inhibitor. Schedule clinical and echocardiographic assessment 4 weeks after inhibitor initiation, and do not up-titrate CAMZYOS until 12 weeks after inhibitor initiation. Avoid initiation of concomitant weak CYP2C19 and moderate CYP3A4 inhibitors in patients who are on stable treatment with 2.5 mg of CAMZYOS because a lower dose is not available.

Potential for CAMZYOS to Affect Plasma Concentrations of Other Drugs

CAMZYOS is an inducer of CYP3A4, CYP2C9, and CYP2C19. Concomitant use with CYP3A4, CYP2C19, or CYP2C9 substrates may reduce plasma concentration of these drugs. Closely monitor when CAMZYOS is used in combination with CYP3A4, CYP2C19, or CYP2C9 substrates unless otherwise recommended in the Prescribing Information.

Certain Combined Hormonal Contraceptives (CHC): Progestin and ethinyl estradiol are CYP3A4 substrates. Concomitant use of CAMZYOS may decrease exposures of certain progestins, which may lead to contraceptive failure. CHCs containing a combination of ethinyl estradiol and norethindrone may be used with CAMZYOS, but if other CHCs are used, advise patients to add nonhormonal contraception (such as condoms) during concomitant use and for 4 months after the last dose of CAMZYOS.

Drugs That Reduce Cardiac Contractility

Expect additive negative inotropic effects of CAMZYOS and other drugs that reduce cardiac contractility. Avoid concomitant use of CAMZYOS in patients on disopyramide, ranolazine, verapamil with a beta blocker, or diltiazem with a beta blocker as these medications and combinations increase the risk of left ventricular systolic dysfunction and heart failure symptoms and clinical experience is limited.

If concomitant therapy with a negative inotrope is initiated, or if the dose of a negative inotrope is increased, monitor LVEF closely until stable doses and clinical response have been achieved.

SPECIFIC POPULATIONS

Pregnancy

CAMZYOS may cause fetal harm when administered to a pregnant female. Advise pregnant females about the potential risk to the fetus with maternal exposure to CAMZYOS during pregnancy. There is a pregnancy safety study for CAMZYOS. If CAMZYOS is administered during pregnancy, or if a patient becomes pregnant while receiving CAMZYOS or within 4 months after the last dose of CAMZYOS, healthcare providers should report CAMZYOS exposure by contacting Bristol Myers Squibb at 1-800-721-5072 or www.bms.com.

Lactation

The presence of CAMZYOS in human or animal milk, the drug’s effects on the breastfed infant, or the effects on milk production are unknown. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for CAMZYOS and any potential adverse effects on the breastfed child from CAMZYOS or from the underlying maternal condition.

Females and Males of Reproductive Potential

Confirm absence of pregnancy in females of reproductive potential prior to initiation of CAMZYOS. Advise females of reproductive potential to use effective contraception during treatment with CAMZYOS and for 4 months after the last dose. CHCs containing a combination of ethinyl estradiol and norethindrone may be used with CAMZYOS. However, CAMZYOS may reduce the effectiveness of certain other combined hormonal contraceptives (CHC). If these CHCs are used, advise patients to add nonhormonal contraception (such as condoms) during concomitant use and for 4 months after the last dose of CAMZYOS.

Please see U.S. Full Prescribing Information, including Boxed WARNING and Medication Guide.

About Bristol Myers Squibb
Bristol Myers Squibb is a global biopharmaceutical company whose mission is to discover, develop and deliver innovative medicines that help patients prevail over serious diseases. For more information about Bristol Myers Squibb, visit us at BMS.com or follow us on LinkedIn, X, YouTube, Facebook and Instagram.

Cautionary Statement Regarding Forward-Looking Statements
This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 regarding, among other things, the research, development and commercialization of pharmaceutical products. All statements that are not statements of historical facts are, or may be deemed to be, forward-looking statements. Such forward-looking statements are based on current expectations and projections about our future financial results, goals, plans and objectives and involve inherent risks, assumptions and uncertainties, including internal or external factors that could delay, divert or change any of them in the next several years, that are difficult to predict, may be beyond our control and could cause our future financial results, goals, plans and objectives to differ materially from those expressed in, or implied by, the statements. These risks, assumptions, uncertainties and other factors include, among others, the possibility of unfavorable results from further clinical trials involving Camzyos (mavacamten) and whether Camzyos for the additional indication described in this release will be successfully developed and commercialized. No forward-looking statement can be guaranteed. Forward-looking statements in this press release should be evaluated together with the many risks and uncertainties that affect Bristol Myers Squibb’s business and market, particularly those identified in the cautionary statement and risk factors discussion in Bristol Myers Squibb’s Annual Report on Form 10-K for the year ended December 31, 2024, as updated by our subsequent Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other filings with the Securities and Exchange Commission. The forward-looking statements included in this document are made only as of the date of this document and except as otherwise required by applicable law, Bristol Myers Squibb undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events, changed circumstances or otherwise.

corporatefinancial-news

View source version on businesswire.com: https://www.businesswire.com/news/home/20250414201642/en/

Bristol Myers Squibb

Media Inquiries:

media@bms.com

Investors:

investor.relations@bms.com

Source: Bristol Myers Squibb

FAQ

What were the results of BMY's ODYSSEY-HCM Phase 3 trial for Camzyos?

The trial failed to meet its dual primary endpoints for non-obstructive HCM treatment, showing no significant improvement in quality of life scores and peak oxygen consumption compared to placebo.

How many patients participated in BMY's ODYSSEY-HCM trial?

The Phase 3 trial enrolled 580 adult patients with symptomatic NYHA class II or III non-obstructive hypertrophic cardiomyopathy worldwide.

Does the ODYSSEY-HCM trial failure affect Camzyos's approval for obstructive HCM?

No, the trial results don't affect Camzyos's established benefits and approvals for obstructive HCM, where it remains approved in over 50 countries.

What were the primary endpoints measured in BMY's ODYSSEY-HCM trial?

The trial measured changes from baseline in Kansas City Cardiomyopathy Questionnaire Clinical Summary Score and peak oxygen consumption at Week 48.