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Updated: Nov 10, 2025

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
Switching treatments in clinically stable relapsing remitting multiple sclerosis patients planning for pregnancy
Lubna Almouzain1,2, Fiona Stevenson1, Declan Chard3
1Research Department at Primary Care and Population Health, Institution of Epidemiology, University College of London, London, UK.
Background:
The decision to have children can be complex, particularly for people with multiple sclerosis (MS). A key concern is the use of disease modifying drugs (DMDs) during pregnancy, and how continuing, stopping or switching them may affect the mother and child. In people with active MS, stopping medications puts the mother at risk of relapse and disease rebound.
Objectives:
Review evidence on the effect of different switching strategies in people with stable relapsing remitting MS (RRMS).
Methods:
We searched MEDLINE, EMBASE, EMCARE, CINAHL, SCOPUS, Cochrane Library up to March 2020. Only papers in English were included and no other limits were applied. Seven articles were included: four cohorts, two case reports and one randomized controlled trial (RCT).
Results:
Two strategies were found: de-escalating, which was associated with an increased risk of relapses, and switching between first line injectables, with no change in relapse rate observed.
Conclusion:
Evidence on the effect of switching strategy on disease course in stable RRMS patients planning for pregnancy is scarce, but when switching, current evidence suggests the risk of relapses mirrors known medication efficacy.
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