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Sphingosine-1-phosphate receptor modulator Pregnancy: eMC §4.6: CONTRAINDICATED during pregnancy and in women of childbearing potential not using effective contraception. Before initiation in women of childbearing potential a negative pregnancy test must be confirmed and repeated at suitable intervals, and counselling given regarding the risk to the foetus. Effective contraception must be used during treatment and for 3 months after discontinuation; ozanimod should be stopped 3 months before planning a pregnancy. If a woman becomes pregnant during treatment, ozanimod must be discontinued, medical advice given about the risk of harmful effects to the foetus, and ultrasonography performed. Animal studies showed reproductive toxicity including foetal loss and anomalies, notably malformations of blood vessels, generalised oedema (anasarca), and malpositioned testes and vertebrae; sphingosine 1-phosphate is known to be involved in vascular formation during embryogenesis. Breast-feeding - ozanimod/metabolites are excreted in the milk of treated animals; because of the potential for serious adverse reactions in nursing infants, women receiving ozanimod should not breastfeed.

Ozanimod

Brand names: Zeposia

Ozanimod is an oral sphingosine-1-phosphate (S1P) receptor modulator used to treat relapsing-remitting multiple sclerosis and moderately-to-severely active ulcerative colitis.

Auto-extracted from the source labelling — not yet independently clinician-verified. These values were distilled from the UK SPC (or the US label where noted) but have not had a clinician sign-off. Confirm against the current SmPC before prescribing.

Adult dose

Dose: 0.92 mg once daily maintenance, after a mandatory 7-day dose escalation: 0.23 mg once daily on Days 1-4, then 0.46 mg once daily on Days 5-7, then 0.92 mg once daily from Day 8
Route: Oral - capsules can be taken with or without food (the US label specifies swallowing capsules whole)
Frequency: Once daily
eMC §4.2 (Zeposia hard capsules). Treatment should be initiated under the supervision of a physician experienced in the management of multiple sclerosis (MS) or ulcerative colitis (UC). The initial 7-day dose escalation regimen is REQUIRED. RE-INITIATION AFTER INTERRUPTION: repeat the same dose escalation regimen if treatment is interrupted for 1 day or more during the first 14 days of treatment; for more than 7 consecutive days between Day 15 and Day 28; or for more than 14 consecutive days after Day 28. If the interruption is shorter than these, continue with the next dose as planned. BEFORE THE FIRST DOSE (eMC §4.4): obtain an ECG in all patients to determine whether pre-existing cardiac abnormalities are present. First-dose 6-hour monitoring for signs and symptoms of symptomatic bradycardia is recommended in patients with a resting heart rate below 55 bpm, second-degree Mobitz type I AV block, or a history of myocardial infarction or heart failure - monitor hourly pulse and blood pressure with an ECG before and at the end of the 6-hour period. Extend monitoring if at hour 6 the heart rate is below 45 bpm, the heart rate is the lowest post-dose value, there is new-onset second-degree or higher AV block, or QTc is 500 msec or more; if medical treatment is required, continue monitoring overnight and repeat the 6-hour monitoring after the second dose. Cardiologist advice should be obtained before initiation in patients with a history of cardiac arrest or cerebrovascular disease (list truncated in the fetched SPC text). Caution when initiating in patients on a beta-blocker or calcium-channel blocker (e.g. diltiazem, verapamil) because of additive heart-rate lowering; these can be started in patients already on stable doses of ozanimod. Ozanimod-induced heart rate decrease can be reversed if necessary by parenteral atropine or isoprenaline. AGE: no dose adjustment is needed over 55 years, but caution is advised in MS patients over 55 and UC patients over 65 given limited data and potential increased risk of adverse reactions, especially with long-term treatment. HEPATIC IMPAIRMENT: patients with mild or moderate chronic hepatic impairment (Child-Pugh A or B) should complete the 7-day dose escalation and then take 0.92 mg once EVERY OTHER DAY; ozanimod must not be used in severe hepatic impairment (Child-Pugh C). PAEDIATRIC: safety and efficacy in children and adolescents below 18 years have not yet been established and no data are available - verify any under-18 use against a children's formulary. The US label adds pre-treatment assessments: complete blood count including lymphocyte count, transaminase and bilirubin levels, baseline fundus (including macula) evaluation, baseline skin examination, and varicella zoster virus antibody testing with vaccination of antibody-negative patients (live attenuated vaccines at least 1 month before initiation). US missed-dose advice: reinitiate with the titration regimen if a dose is missed within the first 2 weeks of treatment; after the first 2 weeks, continue treatment as planned.

Dose adjustments

Renal

eMC §4.2: no dose adjustment is necessary for patients with renal impairment.

Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • Hypersensitivity to the active substance or to any of the excipients (eMC §4.3)
  • Immunodeficient state predisposing to systemic opportunistic infections (eMC §4.3)
  • Myocardial infarction, unstable angina, stroke, transient ischaemic attack, decompensated heart failure requiring hospitalisation, or NYHA Class III/IV heart failure in the last 6 months (eMC §4.3)
  • History or presence of second-degree AV block Type II or third-degree AV block, or sick sinus syndrome, unless the patient has a functioning pacemaker (eMC §4.3; the US label adds sino-atrial block and severe untreated sleep apnoea)
  • Severe active infections, active chronic infections such as hepatitis and tuberculosis; active malignancies; severe hepatic impairment (Child-Pugh C); pregnancy and women of childbearing potential not using effective contraception (eMC §4.3). The US label also contraindicates concomitant use of a monoamine oxidase inhibitor.

Side effects

  • Nasopharyngitis - very common (12.3%); pharyngitis, viral respiratory tract infection, urinary tract infection, herpes zoster and herpes simplex - common; progressive multifocal leukoencephalopathy - rare
  • Lymphopenia - very common
  • Raised liver enzymes - alanine aminotransferase increased (5%), gamma-glutamyl transferase increased (5.4%) and blood bilirubin increased - common; liver injury - rare (post-marketing). Liver enzyme elevations were the most common cause of discontinuation (1.1% in MS studies)
  • Bradycardia - common (transient on initiation, usually resolving by the end of the first week); hypertension and orthostatic hypotension - common
  • Headache - common; peripheral oedema - common; macular oedema - uncommon (in patients with pre-existing risk factors); hypersensitivity including rash and urticaria - uncommon; abnormal pulmonary function tests - common

Interactions

  • Beta-blockers and calcium-channel blockers (e.g. diltiazem, verapamil) - caution when initiating ozanimod because of additive heart-rate lowering; these agents may be started in patients already on stable ozanimod doses. Co-administration of ozanimod in patients on a beta-blocker combined with a calcium-channel blocker has not been studied (eMC §4.4/§4.5)
  • Monoamine oxidase inhibitors - concomitant use is contraindicated in the US label (§4, §7)
  • Anti-neoplastic, immune-modulating or non-corticosteroid immunosuppressive therapies - not studied in combination (except ciclosporin, which showed no pharmacokinetic interaction); use with caution because of the risk of additive immune effects during and in the weeks after such therapy (US label §7)
  • Alemtuzumab - initiating ozanimod after alemtuzumab is not recommended because of the characteristics and duration of alemtuzumab's immunosuppressive effects (US label §7)
  • Beta interferon or glatiramer acetate - ozanimod can generally be started immediately after discontinuation (US label §7). Live attenuated vaccines should be given at least 1 month before initiation (US label §2.1). The full eMC §4.5 interaction section was not captured in this bundle - clinician to review it in the SPC.

Clinical monograph

How it works

It selectively engages S1P1 and S1P5 receptors, trapping lymphocytes within lymph nodes and reducing the number of circulating lymphocytes available to enter the central nervous system.

Prescribing in practice

  • Because it can cause bradycardia and AV conduction delay, a baseline ECG and cardiology review are needed in those with relevant cardiac disease, and dose initiation follows a gradual titration.
  • Screening before starting must include full blood count, varicella-zoster immunity, liver function and an ophthalmological assessment for macular oedema risk.
  • It is contraindicated with concomitant MAO inhibitors, and tyramine-rich foods should be limited because of an active metabolite with MAO-inhibitory properties.

Monitoring

Monitor full blood count, liver function, blood pressure and for signs of infection or macular oedema during treatment, with cardiac observation at initiation where indicated.

Counselling the patient

  • Do not miss doses, as restarting may require repeating the gradual dose build-up.
  • Report any visual disturbance, breathlessness, palpitations, or signs of infection promptly.
  • Avoid live vaccines during and shortly after treatment, and tell your team if you plan to become pregnant.

Evidence & guidelines

The SUNBEAM and RADIANCE trials established its efficacy in relapsing MS, and it is recommended by NICE for relapsing-remitting disease and for ulcerative colitis.

Reference: NICE TA706/TA828; SmPC; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.