Severe Exacerbation of Multiple Sclerosis Following Withdrawal of Fingolimod.

ABSTRACT

BACKGROUND: Fingolimod is an effective therapy for multiple sclerosis (MS). Isolated reports of very aggressive MS rebound after discontinuation of fingolimod are drawing neurologists' attention to this potentially severe complication of the drug. OBJECTIVE: Our objective was to collect literature data on cases of MS rebound following fingolimod withdrawal. In addition, we report six new cases of this adverse event in Brazil. METHODS: We carried out a systematic review of published data on cases of MS rebound after fingolimod was discontinued. In addition, the study reports a retrospective data series of Brazilian patients presenting this rebound reaction. RESULTS: Twenty papers have been published reporting on 52 patients with severe MS rebound after fingolimod withdrawal. Six new patients are included in the present paper, all of them with aggressive rebound and accumulated disability sequelae. CONCLUSION: We recommend gradual discontinuation of fingolimod with replacement by other treatment. The washout period should not exceed 4 weeks.