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Fabrazyme can cause serious side effects, including:

Severe Allergic (anaphylaxis) and Hypersensitivity Reactions

Approximately 1% of patients who have received Fabrazyme either during a clinical study or after Fabrazyme was approved have experienced anaphylactic (allergic) or severe hypersensitivity reactions during their infusion. Life-threatening severe anaphylactic (allergic) or severe hypersensitivity reactions have been seen in patients during Fabrazyme infusions.

• These reactions included: swelling of the face, mouth and throat, narrowing of breathing airways, low blood pressure, hives, difficulty swallowing, rash, trouble breathing, flushing, chest discomfort, itching and nasal congestion.
• People who have experienced these reactions have required treatment including heart/lung resuscitation, oxygen, fluids given through a vein, hospitalization, and treatment with inhaled drugs called beta-adrenergic agonists to help open the breathing airways, antihistamines, epinephrine (also known as adrenaline), and a medication given through the vein called a corticosteroid (or steroid) which helps to decrease the body’s allergic reaction by decreasing inflammation.
• If you experience a severe allergic or anaphylactic reaction, your healthcare professional will immediately stop the infusion of Fabrazyme and provide you the necessary emergency medical treatment. Because of the possibility that severe hypersensitivity reactions may occur, appropriate medical support should be available during your Fabrazyme infusion.

In the clinical studies, some patients developed IgE antibodies or a reaction to an allergy skin test specific to Fabrazyme. IgE antibodies are a specific kind of antibody that can sometimes be produced by the body’s immune system during an allergic reaction.

• Higher amounts of hypersensitivity reactions were seen in adult patients whose immune systems repeatedly made anti-Fabrazyme antibodies and in patients who had high antibody titers (units used to measure how much anti-drug antibody your immune system is making) compared to adult patients with negative antibody titers.
• Your doctor should consider testing for IgE antibodies if you experience suspected allergic reactions. Providing Fabrazyme to patients who have experienced severe or serious allergic reactions to Fabrazyme should only be done after carefully considering the risks and benefits of continuing the treatment, and only under the direct supervision of a qualified healthcare professional and with appropriate medical support readily available.

Infusion-Associated Reactions

In clinical studies with Fabrazyme, 59% of patients experienced infusion-associated reactions during Fabrazyme administration, some of which were severe. Infusion-associated reactions are defined as adverse reactions occurring on the same day as your infusion. During the clinical trials, infusion-associated reactions occurred more frequently in patients who were positive for anti-Fabrazyme antibodies than in patients who did not have anti-Fabrazyme antibodies.

• For patients who have had reactions to their infusions, it is recommended that they be given anti-fever and antihistamine medications right before their next infusions. Infusion-associated reactions have happened in some patients even after taking these medications before their infusions.
• If an infusion-associated reaction occurs, slowing the infusion rate, stopping the infusion for a short time and/or giving more anti-fever and antihistamine medications and or steroids may improve the symptoms.
• If severe infusion-associated reactions happen, your healthcare professional should consider stopping the Fabrazyme infusion right away and should provide medical care for your condition. Severe reactions are generally managed by giving antihistamine medications, corticosteroids, fluids through the vein, and/or oxygen when needed. Because severe infusion-associated reactions may happen, medical treatment should be readily available during your Fabrazyme infusion.
• People with advanced Fabry disease may have heart problems which could put them at a higher risk for severe complications from infusion-associated reactions. These patients should be watched closely during their infusion if the decision is made to give them Fabrazyme.

Common and Other Possible Side Effects: Common side effects reported in 20% or more of Fabrazyme treated patients in clinical studies compared to placebo were upper respiratory tract infection, chills, fever, headache, cough, burning and/or tingling sensation, fatigue, swelling in the legs, dizziness and rash.

Please see full Prescribing Information for Fabrazyme.

Fabrazyme^® is used to treat adults and children 2 years of age and older with confirmed Fabry disease.