Medically reviewed by Drugs.com. Last updated on Aug 7, 2023.
- The recommended dosage of Fabrazyme is 1 mg/kg body weight infused every two weeks as an intravenous infusion.
- Infusion rate:
- The initial intravenous infusion rate is 0.25 mg/min (15 mg/hour). Slow the infusion rate in the event of infusion-associated reactions [see Warnings and Precautions (5.2)].
- For patients >30 kg, after patient tolerance to the infusion is well established, increase the infusion rate in increments of 0.05 to 0.08 mg/min (increments of 3 to 5 mg/hour) with each subsequent infusion. The minimum infusion duration is 1.5 hours (based on individual patient tolerability).
- For patients weighing <30 kg, the maximum infusion rate is 0.25 mg/minute (15 mg/hour).
- Because of the potential for severe infusion-associated reactions, appropriate medical support measures should be readily available when Fabrazyme is administered [see Warnings and Precautions (5.2)].
- Administer antipyretics prior to infusion of Fabrazyme [see Warnings and Precautions (5.2)].
- Rechallenge: Patients who have had a positive skin test to Fabrazyme or who have tested positive for anti-Fabrazyme IgE may be successfully rechallenged with Fabrazyme. The initial rechallenge administration should be a low dose at a lower infusion rate, e.g., one-half the therapeutic dose (0.5 mg/kg) at 1/25th of the initial standard recommended rate (0.01 mg/min). Once a patient tolerates the infusion, the dose may be increased to reach the approved dose of 1 mg/kg and the infusion rate may be increased by slowly titrating upwards (doubled every 30 minutes up to a maximum rate of 0.25 mg/minute), as tolerated [see Adverse Reactions (6.2)].
Preparation and Administration Instructions
Fabrazyme does not contain any preservatives. Vials are for single use only. Discard any unused product.
Avoid shaking or agitating this product. Do not use filter needles during the preparation of the infusion.
Reconstitution and Dilution (using Aseptic Technique)
- Allow Fabrazyme vials and diluent to reach room temperature prior to reconstitution (approximately 30 minutes). The number of 35 mg and 5 mg vials needed is based on the patient's body weight (kg) and the recommended dose of 1 mg/kg.
Select a combination of 35 mg and 5 mg vials so that the total number of mg is equal to or greater than the patient's number of kg of body weight.
- Reconstitute each 35 mg vial of Fabrazyme by slowly injecting 7.2 mL of Sterile Water for Injection, USP down the inside wall of each vial. Roll and tilt each vial gently. Each vial will yield a 5 mg/mL clear, colorless solution (total extractable amount per vial is 35 mg, 7 mL).
Reconstitute each 5 mg vial of Fabrazyme by slowly injecting 1.1 mL of Sterile Water for Injection, USP down the inside wall of each vial. Roll and tilt each vial gently. Each vial will yield a 5 mg/mL clear, colorless solution (total extractable amount per vial is 5 mg, 1 mL).
- Visually inspect the reconstituted vials for particulate matter and discoloration. Do not use the reconstituted solution if there is particulate matter or if it is discolored.
- The reconstituted solution should be further diluted with 0.9% Sodium Chloride Injection, USP to a total volume based on patient weight specified in Table 1 below. Prior to adding the volume of reconstituted Fabrazyme required for the patient dose, remove an equal volume of 0.9% Sodium Chloride Injection, USP from the infusion bag.
Table 1: Total Infusion Volume Based on Patient Weight Patient Weight (kg) Minimum Total Volume (mL) ≤35 50 35.1 to 70 100 70.1 to 100 250 >100 500
Example: Patient dose = 80 mg
80 mg ÷ 5 mg/mL = 16 mL of Fabrazyme
Slowly withdraw the reconstituted solution from each vial up to the total volume required for the patient dose. Inject the reconstituted Fabrazyme solution directly into the Sodium Chloride solution. Do not inject in the airspace within the infusion bag. Discard any vial with unused reconstituted solution.
- Gently invert infusion bag to mix the solution, avoiding vigorous shaking and agitation.
- Do not infuse Fabrazyme in the same intravenous line with other products.
- Administer Fabrazyme using an in-line low protein binding 0.2 µm filter.
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