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What is the treatment for relapsing MS despite Ocrelizumab?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I am 39 years old with relapsing MS on Ocrelizumab; JC virus index 0.9. MRI this year showed one new non-enhancing lesion. Fatigue and leg tingling persist, despite vitamin D levels of 45 ng/mL and B12 levels of 420 pg/mL. When a new lesion appears without a clear relapse, do you adjust infusion timing or consider switching class, and how is that decision weighed? What laboratory tests, vaccines, and infection monitoring are essential on B-cell therapy? Which rehabilitation, cooling, and exercise strategies genuinely improve fatigue and gait day-to-day for patients like me? There have been no relapses since last year.

Thanks.

Answered by Dr. Disha Thapa

Hi,

Welcome to icliniq.com.

I can understand your concern.

Seeing one new non-enhancing lesion on MRI (magnetic resonance imaging) while you are clinically stable on Ocrelizumab does not automatically mean the treatment has failed, but it is something your neurologist keeps a close eye on when weighing whether to continue, adjust timing, or eventually switch. As long as there are no clinical relapses, no enhancing MRI activity, and the overall lesion load is not rapidly increasing, most neurologists would continue Ocrelizumab on the regular six-month infusion schedule, repeating MRI annually.

However, if new lesions continue to appear on back-to-back MRIs, even without clear attacks, then we start considering whether this represents sub-optimal response and whether shortening the interval slightly (every five months) or switching to another highly effective class (like Natalizumab or Ofatumumab) would give you better disease control. This is balanced against your JC (John Cunningham virus) virus index, age, cumulative immunosuppression, and relapse history.

While on B-cell therapy, we monitor CD19/20 counts, lymphocytes, IgG or IgM levels (annually), liver and kidney function, and vaccination status. You should have had Pneumovax and Tdap boosters, annual flu, and the recombinant Shingrix vaccine (even under 50) before infusions when possible. Infection surveillance includes screening for hepatitis B reactivation, COVID (coronavirus) updates, and watching for chronic sinus, lung, or urinary infections given B-cell depletion. Fatigue and gait issues are extremely common even without active disease, and often respond better to rehabilitation strategies than medication changes: graded aerobic exercise (bike, pool walking, rowing), resistance bands, and yoga or pilates improve both fatigue and mobility when done three to four times weekly.

Cooling strategies like cooling vests, pre-cooling with ice packs, and exercising in air-conditioned environments can reduce heat-sensitive fatigue and leg tingling markedly. PT-guided gait training (physical therapy) with core and hip strengthening, balance drills, and regular stretching help maintain smooth walking mechanics. For day-to-day fatigue management, energy conservation techniques, scheduled rest, staying cool, and occasionally medications like Amantadine or Modafinil are used; keeping vitamin D above 50 and B12 in high-normal range is also wise. Overall, the goal is to stay clinically stable without allowing silent progression, and your next MRI and symptom trends will be key in deciding whether to stick with Ocrelizumab or consider an early switch.

I hope this information will help you.

Thanks.

Answered byDr. Disha Thapa

Medically reviewed byiCliniq medical review team

Published At October 30, 2025
Reviewed AtOctober 30, 2025

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