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Serious anaphylaxis cases linked to glatiramer acetate (GA) treatment for multiple sclerosis prompted a US FDA safety labeling update. This highlights the importance of recognizing and managing these rare but severe post-injection reactions.

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Area of Science:

  • Neurology
  • Immunology
  • Pharmacovigilance

Background:

  • Glatiramer acetate (GA) treatment for multiple sclerosis is associated with immediate post-injection reactions.
  • These reactions can mimic anaphylaxis, presenting a significant safety concern.

Purpose of the Study:

  • To document serious anaphylaxis cases attributed to GA.
  • To provide evidence for a postmarketing safety labeling update in the United States.

Main Methods:

  • Systematic review of the FDA Adverse Events Reporting System (FAERS) database.
  • Comprehensive search of published medical literature for GA-associated anaphylaxis cases.

Main Results:

  • Identified 82 cases of anaphylaxis with GA from FAERS and literature.
  • Included 6 fatal outcomes (3 anaphylaxis, 3 sudden death).
  • Anaphylaxis occurred from 1 week to over 1 year after GA initiation, with 19 cases reported beyond the first year.

Conclusions:

  • FDA issued a labeling change, including a BOXED WARNING, for GA prescribing information.
  • A Drug Safety Communication informed the public about the updated safety information.
  • These updates aim to improve patient management and prescribing decisions regarding GA therapy.