Nurses' perspective on approaches to limit flu-like symptoms during interferon therapy for multiple sclerosis.

Background: Several interferon beta (IFNβ) formulations are approved for first-line use as disease-modifying therapies to treat patients with multiple sclerosis (MS). Systemic post-injection reactions, often termed flu-like symptoms (FLS), occur in approximately half of all patients treated with IFNβs and can affect adherence to therapy. These symptoms, which include pyrexia, chills, malaise, myalgia, and headaches, usually resolve within 24 hours or persist intermittently following each injection.