Suspected MS Relapse
New or worsening neurological symptoms in MS patient
All Pathways
NeurologyManagement
Multiple Sclerosis Acute Relapse Management
Multiple Sclerosis Acute Relapse Management: Suspected MS Relapse → Confirm True Relapse → Pseudorelapse? → Treat Underlying Trigger.
Pathway Overview
15 steps
Algorithm Steps
15 total
01Start 02Action Confirm True Relapse
Rule out pseudorelapse
- New symptoms lasting >24 hours
- No fever or infection present
- At least 30 days since last relapse
- Exclude UTI, other infections
- Check for medication changes
03Decision Pseudorelapse?
Transient worsening due to other factors
- Infection (UTI most common)
- Fever, heat exposure
- Stress, fatigue
- Uhthoff's phenomenon
- Pseudorelapse
04Action Treat Underlying Trigger
Address pseudorelapse cause
- Treat infection (antibiotics if UTI)
- Reduce body temperature
- Rest, hydration
- Symptoms resolve when trigger addressed
- True relapse
05Decision Assess Relapse Severity
Mild vs moderate/severe
- Sensory-only: often mild
- Motor weakness: moderate/severe
- Optic neuritis: moderate
- Brainstem symptoms: can be severe
- Functional impairment level
- Mild
06Action Mild Relapse
Observation may be reasonable
- Purely sensory symptoms
- Minimal functional impact
- Steroids optional
- Steroids shorten duration, not final outcome
- Patient preference matters
- If patient wants treatment
07Action High-Dose Corticosteroids
First-line for moderate/severe relapse
- IV methylprednisolone 1g daily × 3-5 days
- OR high-dose oral prednisone 1250 mg daily × 3-5 days
- No taper typically needed for short course
- Shortens relapse duration
- Does NOT affect long-term outcome
08Warning ⚠️ Steroid Precautions
Monitor for adverse effects
- Check glucose (especially in diabetics)
- GI prophylaxis (PPI if needed)
- Insomnia, mood changes common
- Avoid in active infection
- Caution in osteoporosis
09Decision Response to Steroids?
Evaluate after 5-7 days
- Most improve within 3-5 days
- Full recovery may take weeks
- Incomplete recovery common
- Improving
10Action Good Response
Continue observation
- Monitor for full recovery
- May take weeks to months
- Physical therapy if motor deficit
- Review DMT efficacy
11Action Review DMT Strategy
Relapse indicates possible DMT failure
- First relapse on DMT: may continue same
- Multiple relapses: consider switching
- Escalate to higher-efficacy DMT
- Discuss with MS specialist
12Outcome Follow-up Plan
Post-relapse care
- Neurology follow-up in 4-6 weeks
- Consider repeat MRI in 3 months
- DMT adherence counseling
- Patient education on relapse signs
13Action Rehabilitation
Maximize recovery
- Physical therapy for motor deficits
- Occupational therapy for function
- Vision therapy for optic neuritis
- Cognitive rehabilitation if needed
- Path rejoins step 12Shared downstream outcome
- No improvement
14Action Poor or No Response
Consider escalation
- Additional steroid course (controversial)
- Plasma exchange (PLEX)
- ACTH gel (Acthar) alternative
- Specialist consultation
15Action Plasma Exchange (PLEX)
For steroid-refractory severe relapse
- 5-7 exchanges over 10-14 days
- Best evidence for severe relapses
- Optic neuritis, myelitis, brainstem
- Requires central access
- ~40-50% response rate if steroids fail
- Path rejoins step 11Shared downstream outcome
- If resolving
- Path rejoins step 12Shared downstream outcome
- Moderate/Severe
- Path rejoins step 07Shared downstream outcome
Guideline Source
Practice guideline recommendations summary: Disease-modifying therapies for adults with multiple sclerosis - AAN
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- Does not address DMT selection in detail
- PLEX availability varies by center
- Pseudorelapse must be ruled out
- Pediatric MS may differ
Applicable Regions
USEUglobal
EU: ECTRIMS recommendations similar
US: AAN guidelines followed
Version 1Next review: 2027-01-01
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Related Resources
Frequently Asked Questions
What is the Multiple Sclerosis Acute Relapse Management?
The Multiple Sclerosis Acute Relapse Management is a management clinical algorithm for Neurology. It provides a structured decision tree to guide clinical decision-making, based on Practice guideline recommendations summary: Disease-modifying therapies for adults with multiple sclerosis - AAN.
What guideline is the Multiple Sclerosis Acute Relapse Management based on?
This algorithm is based on Practice guideline recommendations summary: Disease-modifying therapies for adults with multiple sclerosis - AAN (DOI: 10.1212/WNL.0000000000005347).
What are the limitations of the Multiple Sclerosis Acute Relapse Management?
Known limitations include: Does not address DMT selection in detail; PLEX availability varies by center; Pseudorelapse must be ruled out; Pediatric MS may differ. Individual patient factors may require deviation from these recommendations.
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