Refacto Side Effects, and Drug Interactions - Antihemophilic Factor

Refacto Side Effects, and Drug Interactions - Antihemophilic Factor

SIDE EFFECTS

As with the intravenous administration of any protein product, the following reactions may be observed after administration: headache, fever, chills, flushing, nausea, vomiting, lethargy, or manifestations of allergic reactions. During clinical studies with ReFacto® Antihemophilic Factor (Recombinant), 77 adverse reactions in 43 of 218 patients (20%) probably or possibly-related to therapy were reported for 64,363 infusions (0.12%). These were anaphylaxis (1), dyspnea (6), urticaria (1), nausea (11), headache (4), vasodilation (5), dizziness (4), permanent venous access catheter complications (3), asthenia (3), fever (3), taste perversion [altered taste] (3), bleeding/hematoma (3), infected hematoma (1), anorexia (2), diarrhea (2), injection site reaction (2), somnolence (2), rash (2), pruritus (2), angina pectoris (1), tachycardia (1), perspiration increased (1), chills (1), increased amino transferase (1), increased bilirubin (1), pain in finger (1), muscle weakness (1), CPK increase (1), cold sensation (1), eye disorder-vision abnormal (1), coughing (1), myalgia (1), gastroenteritis (1), abdominal pain (1), acne (1), and forehead bruises (1). If any adverse reaction takes place that is thought to be related to administration of ReFacto, the rate of infusion should be decreased or stopped.

In addition, inhibitor development is a known adverse event associated with the treatment of patients with hemophilia A (see CLINICAL PHARMACOLOGY).

A total of 182 adverse reactions in 54 of 218 patients (25%) who received 32,013 infusions (0.6%) were reported by the investigator to have an "unlikely" or "not assessable" relationship to ReFacto® administration. The study sponsor considered that the events may be of possible or of unknown relationship to therapy because of the temporal relationship to the infusion and/or the frequency of the event for a given patient and/or because insufficient information was available to assign another causality. In this category, 25 patients experienced the following 38 events which are different from the events described above: pain (10), rhinitis (10), vomiting (4), insomnia (3), constipation (2), pharyngitis (2), flushing (1), palpitation (1), sinusitis (1), gastritis (1), dyspepsia (1), hypotension (1), and URI (1).

Other adverse experiences that were reported during the clinical trials, but which were assessed by both the investigator and the sponsor as "unlikely" to be related to ReFacto administration included: dyspnea (3), rash (2), pruritus (1), neuropathy (1), arm weakness (1), and thrombophlebitis of upper arm (1).

No Information Provided.