Cerezyme Drug Information

CEREZYME is indicated for the treatment of non-central nervous system (CNS) manifestations of Type 1 or Type 3 Gaucher disease in adults and pediatric patients.

Recommendations Prior to CEREZYME Treatment Administer

CEREZYME under the supervision of a healthcare provider knowledgeable in the management of hypersensitivity reactions including anaphylaxis. Initiate CEREZYME in a healthcare setting with appropriate medical monitoring and support measures, including access to cardiopulmonary resuscitation equipment. For patients who experience hypersensitivity reactions to CEREZYME, premedicate with antihistamines and/or corticosteroids.

Monitor patients for the occurrence of new hypersensitivity reactions.

Recommended Dosage and Administration

Ensure physicians knowledgeable in the management of patients with Gaucher disease direct therapy with CEREZYME. The recommended dosage of CEREZYME is 2.5 units/kg three times a week to 60 units/kg once every two weeks administered intravenously. Titrate the dosage based on disease severity and therapeutic goals for the patient.

For adults and pediatric patients weighing greater than 20 kg, infuse the diluted CEREZYME solution over 1 to 2 hours. For pediatric patients weighing 20 kg or less, infuse the diluted CEREZYME solution over 2 hours.

Dosage and Administration Modifications Due to Hypersensitivity Reactions and/or Infusion-Associated Reactions If a severe hypersensitivity reaction (e.g., anaphylaxis) or a severe infusion-associated reaction (IAR) occurs, discontinue CEREZYME and immediately initiate appropriate medical treatment. If a mild or moderate hypersensitivity reaction or a mild or moderate IAR occurs, consider decreasing the infusion rate, temporarily stopping the infusion, and/or administering antihistamines, antipyretics, and/or corticosteroids.

Preparation Instructions

Use aseptic technique during preparation. Reconstitution 1. Determine the number of CEREZYME vials to be reconstituted based on the individual patient's dosage regimen and remove vial(s) from the refrigerator. 2.

Reconstitute each vial of CEREZYME by slowly injecting 10.2 mL of Sterile Water for Injection, down the inside wall of each vial. 3. Roll and tilt the vial to allow the powder to dissolve completely. Visually inspect the reconstituted solution for particulate matter and discoloration.

Discard if opaque particles or discoloration are observed. After reconstitution, each vial will yield CEREZYME at a concentration of 40 units/mL. 4. Withdraw the required volume of CEREZYME from the vial(s).

Dilution Dilute the CEREZYME solution for infusion promptly with 0.9% Sodium Chloride Injection to a final volume that is calculated based on prescribed dose. For CEREZYME administered at a dose of 60 units/kg, use the following final volumes (see Table 1 ). For patients weighing between 1.5 kg and less than 6 kg, dilute CEREZYME to a final volume of 12 mL in a syringe for infusion.

For patients weighing between 13 kg and less than or equal to 20 kg, dilute CEREZYME to a final volume of 100 mL in an infusion bag. If the determined dose of CEREZYME translates into a total volume of 26 mL or less, administer using a syringe for infusion via a syringe pump. For accuracy of dilution, if less than 2 mL of reconstituted CEREZYME (40 units/mL) is needed for the preparation of the determined dose, prepare a larger final volume of CEREZYME for infusion initially maintaining the final concentration of the diluted CEREZYME solution between 6 units/mL to 30 units/mL.

Subsequently, discard the excess volume and administer only the volume of CEREZYME solution corresponding to the prescribed dose. Gently invert the syringe for infusion or the infusion bag to mix the solution. Throughout CEREZYME preparation, avoid vigorous shaking, agitation and foaming.

Vials are for single dose only. Discard any unused solution.

Administration Instructions

Slight flocculation of protein particles (described as thin translucent fibers) may occur after dilution and does not affect the quality of the product. Administer CEREZYME as an intravenous infusion with a 0.2 micron in-line low protein-binding filter. Table 1: Total Infusion Volumes and

Storage and Handling If the reconstituted

CEREZYME vial is not used immediately: Refrigerate the reconstituted solution at 2°C to 8°C (36°F to 46°F) or store at room temperature at 20°C to 25°C (68°F to 77°F) for up to 12 hours. Refrigerate the diluted solution at 2°C to 8°C (36°F to 46°F) for up to 24 hours.

Clinical Trials and Postmarketing Experience

The following adverse reactions associated with the use of imiglucerase were identified in clinical studies or postmarketing reports. Because some of these reactions were reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. See Table 2 for adverse reactions occurring in adults and pediatric patients treated with CEREZYME in clinical trials and the postmarketing setting.

Table 2: Adverse Reactions in Adults and Pediatric Patients Treated with CEREZYME cyanosis, Signs and symptoms suggestive of hypersensitivity reactions including anaphylaxis and other infusion-associated reactions. flushing, hypotension, hypertension

Immunogenicity

The observed incidence of anti-drug antibodies (ADA) is highly dependent on the sensitivity and specificity of the assay. Differences in assay methods preclude meaningful comparisons of the incidence of ADA in the studies described below with the incidence of ADA in other studies, including those of CEREZYME or of other imiglucerase products. Approximately 15% of patients treated and tested to date have developed IgG antibody to CEREZYME during the first year of therapy.

Patients who developed IgG antibody did so largely within 6 months of treatment and rarely developed antibodies to CEREZYME after 12 months of therapy. Approximately 46% of patients with detectable IgG antibodies experienced symptoms of hypersensitivity. Patients with antibody to CEREZYME have higher risk of hypersensitivity reaction.

Patients who developed IgG antibody to CEREZYME had increased elimination half-life compared to patients without antibody.

Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to CEREZYME during pregnancy. Pregnant women exposed to CEREZYME and health care providers are encouraged to contact the Gaucher patient registry at 1-800-745-4447, extension 15500 or visit www.registrynxt.com. Risk Summary Available data on more than 500 pregnancies from the international Gaucher Disease registry, postmarketing reports, published observational studies and case reports with CEREZYME or non–US-licensed imiglucerase use in pregnant women have not identified a drug-associated risk of major birth defects, miscarriage, or other adverse maternal or fetal outcomes.

There are risks associated with symptomatic Type I Gaucher disease in pregnancy (see Clinical Considerations ). No animal reproduction studies have been conducted with imiglucerase. The estimated background risk of major birth defects and miscarriage in the indicated population is unknown.

All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk Pregnancy may exacerbate existing Type 1 Gaucher disease symptoms or result in new disease manifestations.

Untreated symptomatic Type 1 Gaucher disease may lead to complications during pregnancy, including hepatosplenomegaly, which can interfere with the normal growth of a pregnancy and thrombocytopenia, which can lead to excessive bleeding.

Pediatric Use The safety and effectiveness of CEREZYME for the treatment of non-CNS manifestations of Type 1 or Type 3 Gaucher disease have been established in pediatric patients. Use of CEREZYME for the treatment of non-CNS manifestations of Type 1 Gaucher disease is supported by evidence from adequate and well-controlled trials in adults and pediatric patients 12 years of age and older and additional safety and efficacy data from an observational study of Type 1 Gaucher disease in pediatric patients.