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ANAPHYLAXIS, SEVERE ALLERGIC AND IMMUNE MEDIATED REACTIONS and RISK OF CARDIORESPIRATORY FAILURE
Life-threatening anaphylactic, severe allergic and immune mediated reactions have been observed in some patients during MYOZYME® infusions. Therefore, appropriate medical support should be readily available when MYOZYME is administered. [see WARNINGS AND PRECAUTIONS]
Risk of Cardiorespiratory Failure
Patients with compromised cardiac or respiratory function may be at risk for serious acute exacerbation of their cardiac or respiratory compromise due to infusion reactions, and require additional monitoring. [see WARNINGS AND PRECAUTIONS]
MYOZYME (alglucosidase alfa), a lysosomal glycogen-specific enzyme, consists of the human enzyme acid α-glucosidase (GAA), encoded by the most predominant of nine observed haplotypes of this gene. MYOZYME is produced by recombinant DNA technology in a Chinese hamster ovary cell line. The MYOZYME manufacturing process differs from that for LUMIZYME® , resulting in differences in some product attributes. Alglucosidase alfa degrades glycogen by catalyzing the hydrolysis of α-1,4- and α-1,6- glycosidic linkages of lysosomal glycogen.
Alglucosidase alfa is a glycoprotein with a calculated mass of 99,377 daltons for the polypeptide chain, and a total mass of approximately 110 kilo Daltons, including carbohydrates. Alglucosidase alfa has a specific activity of 3 to 5 U/mg (one unit is defined as that amount of activity that results in the hydrolysis of 1 μmole of synthetic substrate per minute under the specified assay conditions). MYOZYME is intended for intravenous infusion. It is supplied as a sterile, nonpyrogenic, white to off-white, lyophilized cake or powder for reconstitution with 10.3 mL Sterile Water for Injection, USP. Each 50 mg vial contains 52.5 mg alglucosidase alfa, 210 mg mannitol, 0.5 mg polysorbate 80, 9.9 mg sodium phosphate dibasic heptahydrate, 31.2 mg sodium phosphate monobasic monohydrate. Following reconstitution as directed, each vial contains 10.5 mL reconstituted solution and a total extractable volume of 10 mL at 5.0 mg/mL alglucosidase alfa. MYOZYME does not contain preservatives; each vial is for single use only.
Last reviewed on RxList: 7/27/2012
This monograph has been modified to include the generic and brand name in many instances.
Additional Myozyme Information
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