Such reactions could occur even years after the start of treatment, the European Medicines Agency (EMA) warned.
Glatiramer acetate is a disease-modifying therapy (DMT) for relapsing MS that is given by injection.
The drug has been used for treating MS for more than 20 years, during which time, it has had a good safety profile. Common side effects are known to include vasodilation, arthralgia, anxiety, hypertonia, palpitations, and lipoatrophy.
A meeting of the EMA’s Pharmacovigilance Risk Assessment Committee (PRAC), held on July 8-11, considered evidence from an EU-wide review of all available data concerning anaphylactic reactions with glatiramer acetate. As a result, the committee concluded that the medicine is associated with a risk for anaphylactic reactions, which may occur shortly after administration or even months or years later.
Risk for Delays to Treatment
Cases involving the use of glatiramer acetate with a fatal outcome have been reported, PRAC noted.
The committee cautioned that because the initial symptoms could overlap with those of postinjection reaction, there was a risk for delay in identifying an anaphylactic reaction.
PRAC has sanctioned a direct healthcare professional communication (DHPC) to inform healthcare professionals about the risk. Patients and caregivers should be advised of the signs and symptoms of an anaphylactic reaction and the need to seek emergency care if this should occur, the committee added. In the event of such a reaction, treatment with glatiramer acetate must be discontinued, PRAC stated.
Once adopted, the DHPC for glatiramer acetate will be disseminated to healthcare professionals by the marketing authorization holders.
Anaphylactic reactions associated with the use of glatiramer acetate have been noted in medical literature for some years. A letter by members of the department of neurology at Albert Ludwig University Freiburg, Freiburg im Bresigau, Germany, published in the journal European Neurology in 2011, detailed six cases of anaphylactoid or anaphylactic reactions in patients while they were undergoing treatment with glatiramer acetate.
The authors highlighted that in one of the cases, a grade 1 anaphylactic reaction occurred 3 months after treatment with the drug was initiated.
A version of this article first appeared on Medscape.com.