Fatal PML in a patient treated with compounded dimethyl fumarate with only modest lymphocytopenia

In the past decade, the therapeutic arsenal for multiple sclerosis has expanded greatly. Newer more potent disease modifying therapies (DMTs) with varying mechanisms of actions are increasingly used early in the disease course. These newer DMTs include oral therapies (teriflunomide, dimethyl fumarate, fingolimod, siponimod, ozanimod, and cladribine) and infusion therapies (natalizumab, alemtuzumab, and ocrelizumab), and are associated with better control of disease activity and long-term outcomes in patients with MS compared to older injectable therapies (interferon beta and glatiramer acetate). However, they are associated with safety concerns and subsequent monitoring requirements. Adverse events are initially observed in phase 2 and 3 clinical trials, and further long-term data are collected in phase 3 extension studies, case series, and post-marketing reports, which highlight the need to periodically re-evaluate and adjust monitoring strategies to optimize treatment safety in an individualized approach.

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Safety of Newer Disease Modifying Therapies in Multiple Sclerosis

Jalkh

Nahed

Macaron

et al. 2020

Vaccines

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Fatal PML in a patient treated with compounded dimethyl fumarate with only modest lymphocytopenia

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Safety of Newer Disease Modifying Therapies in Multiple Sclerosis

Safety of Newer Disease Modifying Therapies in Multiple Sclerosis

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