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U.S. Food and Drug Administration Updates CAMZYOS® (mavacamten) Label to Reduce Echocardiography Monitoring Requirements and Contraindications

PRINCETON, N.J.--(BUSINESS WIRE)--Apr 17, 2025-- Bristol Myers Squibb (NYSE: BMY) today announced that the U.S. Food and Drug Administration (FDA) has updated the U.S. Prescribing Information for CAMZYOS ® (mavacamten, 2.5 mg, 5 mg, 10 mg, 15 mg capsules), simplifying treatment for patients and physicians by reducing the required echo monitoring for eligible patients in the maintenance phase and expanding patient eligibility by reducing contraindications. CAMZYOS is the first and only FDA-approved cardiac myosin inhibitor 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. 1 'In addition to the established efficacy of CAMZYOS, these meaningful updates to the label reinforce the strong safety profile of the therapy. With robust clinical and real-world data and more than 15,000 patients prescribed CAMZYOS in the U.S., 2 this medicine has redefined the treatment landscape for symptomatic obstructive HCM and can have a significant impact for patients living with the condition,' said Al Reba, senior vice president, Cardiovascular & Immunology Commercialization at Bristol Myers Squibb. 'Simplifying treatment by reducing the frequency of echo monitoring not only improves the patient experience, but will also save time for cardiologists, allowing them to treat more patients.' FDA-approved updates include reduced frequency of required echo monitoring from once every 12 weeks to every 6 months for patients with left ventricular ejection fraction (LVEF) ≥55% and a Valsalva left ventricular outflow tract (LVOT) gradient <30 mmHg (or Valsalva LVOT ≥30 mmHg without up-titration) who have reached the maintenance phase (at Week 12 or later). 1,3 Additionally, CAMZYOS is no longer contraindicated with moderate CYP2C19 inhibitors and strong CYP3A4 inhibitors, which were adjusted to drug interactions. This provides physicians with greater flexibility in prescribing CAMZYOS to a broader group of eligible patients, with revised dosing and monitoring. The approved label update is supported by long-term clinical and real-world data, including analyses of results from the CAMZYOS Risk Evaluation and Mitigation Strategy (REMS) Program, real-world experience from three single-center studies, and ongoing clinical data reinforcing the safety profile of CAMZYOS through 3.5 years. 4,5 CAMZYOS is included in both the ESC and AHA/ACC/Multisociety clinical guidelines as a recommended option for patients with persistent symptoms on a first-line therapy 6,7 and is established as a standard of care for the treatment of adults with symptomatic obstructive HCM, supported by a growing body of evidence. The full U.S. Prescribing Information for CAMZYOS includes a Boxed WARNING for the 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 strong CYP2C19 inhibitors and 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. Please see additional Important Safety Information including Boxed WARNING below. Please refer to the updated CAMZYOS label linked here for full dosing guidelines and additional information. Bristol Myers Squibb offers various programs and resources to address the needs of patients and caregivers, and provides support that allows for access to therapies, including CAMZYOS. For additional information call 855-CAMZYOS (855-226-9967) 8 am to 11 pm ET, Monday through Friday. 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: 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: WARNINGS AND PRECAUTIONS 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. 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. Further information is available at or by telephone at 1-833-628-7367. 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 Impact of Other Drugs on CAMZYOS: Certain Combined Hormonal Contraceptives (CHCs): 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) or use an alternative contraceptive method that is not affected by CYP450 enzyme induction (eg, intrauterine system) during concomitant use and for 4 months after the last dose of CAMZYOS. 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 Please see U.S. Full Prescribing Information, including Boxed WARNING and Medication Guide. References corporatefinancial-news View source version on CONTACT: Bristol Myers Squibb Media Inquiries: [email protected] Investors: [email protected] KEYWORD: UNITED STATES NORTH AMERICA NEW JERSEY INDUSTRY KEYWORD: SCIENCE CARDIOLOGY BIOTECHNOLOGY RESEARCH PHARMACEUTICAL HEALTH FDA CLINICAL TRIALS SOURCE: Bristol Myers Squibb Copyright Business Wire 2025. PUB: 04/17/2025 08:21 PM/DISC: 04/17/2025 08:22 PM