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Bristol Myers Squibb Announces New Data from the Long-Term DAYBREAK Study Reinforcing Efficacy and Safety of Zeposia (ozanimod) in Patients with Relapsing Forms of Multiple Sclerosis

Sustained efficacy was confirmed with an annualized relapse rate of 0.098 and 67% of patients were relapse-free at six years

Safety was consistent with prior findings and the established safety profile of Zeposia with nearly 10 years of clinical experience

In a separate DAYBREAK analysis, nearly 97% of followed patients were relapse-free at 90 days post Zeposia discontinuation; patients that did relapse showed no evidence of rebound effect

Bristol Myers Squibb (NYSE: BMY) today announced new results from the Phase 3 DAYBREAK open-label extension trial, demonstrating the long-term efficacy and safety profile of Zeposia (ozanimod) in patients with relapsing forms of multiple sclerosis (MS). These data (Poster #P090) and nine additional abstracts will be presented at the 9th annual Americas Committee for Treatment and Research in Multiple Sclerosis (ACTRIMS) Forum 2024 in West Palm Beach, Florida taking place February 29 to March 2.

In the DAYBREAK long-term extension study, treatment with Zeposia demonstrated a low annualized relapse rate of 0.098. Three- and six-month confirmed disability progression was absent in 82.8% and 84.8% of participants in the trial respectively. At Month 60, the adjusted mean number of new/enlarging T2 lesions per scan (range: 0.79–0.93) and the adjusted mean number of gadolinium-enhancing lesions (0.06–0.08) were similar across patient cohorts.

“These DAYBREAK data continue to validate the role of Zeposia in the long-term management of relapsing forms of multiple sclerosis, with two-thirds of patients relapse-free at six years of treatment,” said Bruce Cree, MD, PhD, MAS, study investigator and professor of Clinical Neurology, University of California San Francisco (UCSF) Weill Institute for Neurosciences and Clinical Research Director, UCSF MS Center. “These findings add to our confidence in Zeposia as an important treatment option for people living with the disease, highlighting its efficacy and safety over time.”

In the DAYBREAK trial, 2,494 participants were exposed to Zeposia for an average of 60.9 months (12,664.7 person-years); 2,219 participants (89.0%) had any treatment-emergent adverse event (TEAE), 381 (15.3%) had a serious TEAE and 98 (3.9%) discontinued the study due to a TEAE. The most common TEAEs were nasopharyngitis (21.3%), headache (17.1%), COVID-19 infection (16.5%) and upper respiratory tract infection (12.4%). No new safety signals emerged; data from this long-term observational study of patients treated for up to 81.5 months were consistent with the established safety profile of Zeposia.

Additionally, a separate analysis (Poster #P097) was conducted to assess the risk of rebound after Zeposia discontinuation in the DAYBREAK trial. Five hundred forty-four participants (21.8%) discontinued the study early, while 1,950 participants (78.2%) remained on treatment until the end of the trial. Approximately 2.2% were known to have relapsed after permanently discontinuing Zeposia, with 87.3% of relapses occurring between 29 and 90 days (median time to onset: 61 days) after discontinuation. Nearly all patients were not taking any disease modifying therapy for MS at the time of relapse. Most relapses were mild (n=20 [36.4%]) or moderate (n=34 [61.8%]) and most patients made a complete recovery. No post-treatment relapse was associated with rebound effect, characterized by severe exacerbation of disease or severe persistent increase in disability.

“Currently no cure exists for multiple sclerosis, but effective strategies and treatments can help slow disease progression and alleviate symptoms,” said Jonathan Sadeh, MD, MSc, senior vice president and head of global program leaders, Immunology, Cardiovascular and Neuroscience development, Bristol Myers Squibb. “These DAYBREAK efficacy, safety and rebound data underscore a consistent and sustained safety and efficacy profile and add to the body of evidence supporting Zeposia’s role in the treatment armamentarium. We remain focused on advancing care and delivering meaningful innovations in neuroscience, including for the millions of people impacted by relapsing forms of multiple sclerosis.”

At the ACTRIMS Forum 2024, Bristol Myers Squibb and collaborators will present multiple abstracts that reinforce the company’s growing body of research on Zeposia as a treatment for relapsing forms of MS and unwavering commitment to people living with the disease.

Summary of Presentations:

Bristol Myers Squibb presentations featured at the ACTRIMS Forum 2024 include:

Zeposia clinical abstracts

  • Long-term safety and efficacy of ozanimod in relapsing multiple sclerosis: Final analysis of the DAYBREAK open-label extension study

    Author: Krzysztof Selmaj

    Presentation Number: P090

    Session Number: Poster session 1

  • Absence of rebound effect following ozanimod discontinuation among participants in the DAYBREAK open-label extension study

    Author: Ralf Gold

    Presentation Number: P097

    Session: Poster session 1

  • Patient-reported outcomes after 1 year of ozanimod use for early relapsing multiple sclerosis: An interim analysis of the ENLIGHTEN study

    Author: Sarah Morrow

    Presentation Number: P433

    Session: Poster session 2

  • Baseline predictors of long-term disability progression in ozanimod-treated participants with relapsing multiple sclerosis from the SUNBEAM, RADIANCE, and DAYBREAK trials

    Author: Hans-Peter Hartung

    Presentation Number: P096

    Session: Poster session 1

  • Changes in cognitive functioning over 1 year in ozanimod-treated patients with early relapsing multiple sclerosis: An interim analysis of the ENLIGHTEN study

    Author: John DeLuca

    Presentation Number: P354

    Session: Poster session 2

  • Long-term efficacy of ozanimod in disease-modifying treatment–naive vs experienced patients with relapsing multiple sclerosis

    Author: Diego Centonze

    Presentation Number: P092

    Session: Poster session 1

  • Long-term efficacy of the sphingosine 1-phosphate receptor modulator ozanimod by age category in patients with relapsing multiple sclerosis: Final results from two Phase 3 trials and an open-label extension trial

    Author: Bruce Cree

    Presentation Number: P091

    Session: Poster session 1

  • Effects of ozanimod on cognitive processing speed: Updated findings from the Phase 3 SUNBEAM and DAYBREAK extension trials

    Author: John DeLuca

    Presentation Number: P353

    Session: Poster session 2

Zeposia MS health economics outcomes research abstracts

  • Real-world clinical outcomes for disease-modifying therapy–naïve and experienced patients with multiple sclerosis treated with ozanimod: A U.S. retrospective medical chart review

    Author: Damemarie Paul

    Presentation Number: P477

    Session: Poster session 2

  • Ozanimod use in patients with multiple sclerosis treated in a large U.S. healthcare system: A retrospective case series

    Author: Jennifer Hadlock

    Presentation Number: P478

    Session: Poster session 2

Bristol Myers Squibb thanks the patients and investigators who have participated in Zeposia clinical trials.


DAYBREAK was a Phase 3, multi-center, long-term open-label extension study to evaluate the safety and efficacy of Zeposia (ozanimod) administered orally to patients with relapsing forms of multiple sclerosis (RMS).

Eligible patients from the RADIANCE, SUNBEAM and RPC01-1001 trials diagnosed with RMS were enrolled to receive treatment until the end of the DAYBREAK. Patients in the trial received Zeposia 0.92 mg (equivalent to 1 mg).

About Multiple Sclerosis

Multiple sclerosis (MS) is a disabling, unpredictable disease in which the immune system attacks the protective myelin sheath that covers the nerves. The myelin damage disrupts communication between the brain and the rest of the body. Ultimately, the nerves themselves may deteriorate—a process that's currently irreversible. MS affects 700,000 people in Europe and approximately 2.9 million people worldwide.

Relapsing forms of MS (RMS), including clinically isolated syndrome, relapsing remitting disease and active secondary progressive disease, is characterized by clearly defined attacks of worsening neurologic function. These attacks—often called relapses, flare-ups or exacerbations—are followed by partial or complete recovery periods. During these recovery periods, also called remissions, symptoms improve partially or completely with no apparent progression of disease. However, smoldering neuroinflammation can be present from the earliest stages of MS, which is underlying and continuous disease activity occurring simultaneously in different areas of the brain that contributes to disability accumulation. Since MS relapses are unpredictable, patients can feel frustrated, stressed or scared when they occur. RMS is the most common disease course at the time of diagnosis. Approximately 85% of patients are initially diagnosed with RMS, compared with 10%-15% diagnosed with progressive forms of the disease.

Bristol Myers Squibb: Delivering Breakthrough Science for Meaningful Interventions in Neuroscience

Neurological conditions represent some of the greatest challenges of our time because of their impact on society, including patients, caregivers, families and healthcare systems. At Bristol Myers Squibb, we are committed to advancing our robust pipeline of potential medicines for neurological disorders with the goal of modifying disease and improving quality of life. Leveraging genetics, biomarkers and predictive sciences, we target key pathways involved in the initiation and progression of neurological diseases to develop therapies with the potential to optimize patient outcomes.

About Zeposia (ozanimod)

Zeposia (ozanimod) is an oral, sphingosine 1-phosphate (S1P) receptor modulator that binds with high affinity to S1P receptors 1 and 5. Zeposia blocks the capacity of lymphocytes to egress from lymph nodes, reducing the number of lymphocytes in peripheral blood. The mechanism by which Zeposia exerts therapeutic effects in multiple sclerosis (MS) is unknown but may involve the reduction of lymphocyte migration into the central nervous system.

Zeposia is approved in numerous countries around the world for the treatment of adults with relapsing forms of MS and adults with moderately to severely active ulcerative colitis.


ZEPOSIA® (ozanimod) is indicated for the treatment of:

  1. Relapsing forms of multiple sclerosis (MS), to include clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease, in adults.
  2. Moderately to severely active ulcerative colitis (UC) in adults.



  • Patients who in the last 6 months, experienced myocardial infarction, unstable angina, stroke, transient ischemic attack (TIA), decompensated heart failure requiring hospitalization, or Class III/IV heart failure or have a presence of Mobitz type II second-degree or third-degree atrioventricular (AV) block, sick sinus syndrome, or sino-atrial block, unless the patient has a functioning pacemaker
  • Patients with severe untreated sleep apnea
  • Patients taking a monoamine oxidase (MAO) inhibitor

Infections: ZEPOSIA may increase the susceptibility to infections. Life-threatening and rare fatal infections have occurred in patients receiving ZEPOSIA. Obtain a recent (i.e., within 6 months or after discontinuation of prior MS or UC therapy) complete blood count (CBC) including lymphocyte count before initiation of ZEPOSIA. Delay initiation of ZEPOSIA in patients with an active infection until the infection is resolved. Consider interruption of treatment with ZEPOSIA if a patient develops a serious infection. Continue monitoring for infections up to 3 months after discontinuing ZEPOSIA.

  • Herpes zoster was reported as an adverse reaction in ZEPOSIA-treated patients. Herpes simplex encephalitis and varicella zoster meningitis have been reported with sphingosine 1-phosphate (S1P) receptor modulators. Patients without a healthcare professional-confirmed history of varicella (chickenpox), or without documentation of a full course of vaccination against varicella zoster virus (VZV), should be tested for antibodies to VZV before initiating ZEPOSIA. A full course of vaccination for antibody-negative patients with varicella vaccine is recommended prior to commencing treatment with ZEPOSIA.
  • Cases of fatal cryptococcal meningitis (CM) were reported in patients treated with another S1P receptor modulator. If CM is suspected, ZEPOSIA should be suspended until cryptococcal infection has been excluded. If CM is diagnosed, appropriate treatment should be initiated.
  • In the MS and UC clinical studies, patients who received ZEPOSIA were not to receive concomitant treatment with antineoplastic, non-corticosteroid immunosuppressive, or immune-modulating therapies used for treatment of MS and UC. Concomitant use of ZEPOSIA with any of these therapies would be expected to increase the risk of immunosuppression. When switching to ZEPOSIA from immunosuppressive medications, consider the duration of their effects and their mode of action to avoid unintended additive immunosuppressive effects.
  • Use of live attenuated vaccines should be avoided during and for 3 months after treatment with ZEPOSIA. If live attenuated vaccine immunizations are required, administer at least 1 month prior to initiation of ZEPOSIA.

Progressive Multifocal Leukoencephalopathy (PML): PML is an opportunistic viral infection of the brain that typically occurs in patients who are immunocompromised, and that usually leads to death or severe disability.

PML has been reported in patients treated with S1P receptor modulators, including ZEPOSIA, and other MS and UC therapies and has been associated with some risk factors. If PML is suspected, withhold ZEPOSIA and perform an appropriate diagnostic evaluation.

If confirmed, treatment with ZEPOSIA should be discontinued.

Immune reconstitution inflammatory syndrome (IRIS) has been reported in MS patients treated with S1P receptor modulators who developed PML and subsequently discontinued treatment. IRIS presents as a clinical decline in the patient’s condition that may be rapid, can lead to serious neurological complications or death, and is often associated with characteristic changes on MRI. The time to onset of IRIS in patients with PML was generally within a few months after S1P receptor modulator discontinuation. Monitoring for development of IRIS and appropriate treatment of the associated inflammation should be undertaken.

Bradyarrhythmia and Atrioventricular Conduction Delays: Since initiation of ZEPOSIA may result in a transient decrease in heart rate and atrioventricular conduction delays, dose titration is recommended to help reduce cardiac effects. Initiation of ZEPOSIA without dose escalation may result in greater decreases in heart rate. If treatment with ZEPOSIA is considered, advice from a cardiologist should be sought for those individuals:

  • with significant QT prolongation
  • with arrhythmias requiring treatment with Class 1a or III anti-arrhythmic drugs
  • with ischemic heart disease, heart failure, history of cardiac arrest or myocardial infarction, cerebrovascular disease, and uncontrolled hypertension
  • with a history of Mobitz type II second-degree or higher AV block, sick sinus syndrome, or sino-atrial heart block

Liver Injury: Elevations of aminotransferases may occur in patients receiving ZEPOSIA. Obtain liver function tests, if not recently available (i.e., within 6 months), before initiation of ZEPOSIA. Patients who develop symptoms suggestive of hepatic dysfunction should have hepatic enzymes checked and ZEPOSIA should be discontinued if significant liver injury is confirmed.

Fetal Risk: There are no adequate and well-controlled studies in pregnant women. Based on animal studies, ZEPOSIA may cause fetal harm. Women of childbearing potential should use effective contraception to avoid pregnancy during treatment and for 3 months after stopping ZEPOSIA. Women who become pregnant while taking ZEPOSIA for MS may enroll in the ZEPOSIA pregnancy registry by calling 1-877-301-9314 or visiting

Increased Blood Pressure: Increase in systolic pressure was observed after about 3 months of treatment and persisted throughout treatment. Blood pressure should be monitored during treatment and managed appropriately. Certain foods that may contain very high amounts of tyramine could cause severe hypertension in patients taking ZEPOSIA. Patients should be advised to avoid foods containing a very large amount of tyramine while taking ZEPOSIA.

Respiratory Effects: ZEPOSIA may cause a decline in pulmonary function. Spirometric evaluation of respiratory function should be performed during therapy, if clinically indicated.

Macular Edema: S1P modulators have been associated with an increased risk of macular edema. Patients with a history of uveitis or diabetes mellitus are at increased risk. Patients with a history of these conditions should have an ophthalmic evaluation of the fundus, including the macula, prior to treatment initiation and regular follow-up examinations. An ophthalmic evaluation is recommended in all patients at any time if there is a change in vision. Continued use of ZEPOSIA in patients with macular edema has not been evaluated; potential benefits and risks for the individual patient should be considered if deciding whether ZEPOSIA should be discontinued.

Posterior Reversible Encephalopathy Syndrome (PRES): Rare cases of PRES have been reported in patients receiving a S1P receptor modulator. If a ZEPOSIA-treated patient develops unexpected neurological or psychiatric symptoms or any symptom/sign suggestive of an increase in intracranial pressure, a complete physical and neurological examination should be conducted. Symptoms of PRES are usually reversible but may evolve into ischemic stroke or cerebral hemorrhage. Delay in diagnosis and treatment may lead to permanent neurological sequelae. If PRES is suspected, treatment with ZEPOSIA should be discontinued.

Unintended Additive Immunosuppressive Effects From Prior Immunosuppressive or Immune-Modulating Drugs: When switching from drugs with prolonged immune effects, the half-life and mode of action of these drugs must be considered to avoid unintended additive immunosuppressive effects while at the same time minimizing risk of disease reactivation. Initiating treatment with ZEPOSIA after treatment with alemtuzumab is not recommended.

Severe Increase in Multiple Sclerosis (MS) Disability After Stopping ZEPOSIA: In MS, severe exacerbation of disease, including disease rebound, has been rarely reported after discontinuation of a S1P receptor modulator. The possibility of severe exacerbation of disease should be considered after stopping ZEPOSIA treatment so patients should be monitored upon discontinuation. After stopping ZEPOSIA in the setting of PML, monitor for development of immune reconstitution inflammatory syndrome (PML-IRIS).

Immune System Effects After Stopping ZEPOSIA: After discontinuing ZEPOSIA, the median time for lymphocyte counts to return to the normal range was 30 days with approximately 90% of patients in the normal range within 3 months. Use of immunosuppressants within this period may lead to an additive effect on the immune system, therefore caution should be applied when initiating other drugs 4 weeks after the last dose of ZEPOSIA.

Most Common Adverse Reactions that occurred in the MS clinical trials of ZEPOSIA-treated patients (≥4%): upper respiratory infection, hepatic transaminase elevation, orthostatic hypotension, urinary tract infection, back pain, and hypertension.

In the UC clinical trials, the most common adverse reactions that occurred in ≥4% of ZEPOSIA-treated patients and greater than in patients who received placebo were upper respiratory infection, liver test increased, and headache.

Use in Specific Populations: Hepatic Impairment: Dosage adjustment in patients with mild or moderate hepatic impairment (Child-Pugh class A or B) is required, and use of ZEPOSIA in patients with severe hepatic impairment (Child-Pugh class C) is not recommended.

For additional safety information, please see the full Prescribing Information 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 or follow us on LinkedIn, Twitter, 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, that results of future post-marketing studies will be consistent with the results of this study, that Zeposia (ozanimod) for the additional indication described in this release may not be commercially successful, any marketing approvals, if granted, may have significant limitations on their use, and that continued approval of such treatment for such additional indication may be contingent upon verification and description of clinical benefit in additional confirmatory trials. 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, 2023, 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.


Today at #ACTRIMSForum, $BMY announced new results from a Phase 3 long-term study evaluating safety and efficacy of an approved oral medicine for patients with relapsing forms of #MultipleSclerosis. Read more.


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