Elaprase^® Dose Calculator

Idursulfase dose calculation tool for HCPs

Patient weight in kg

kg

Dispose any unused portion

Calculation process

('patient weight' kg × 0.5 mg/kg) 2 mg/mL

= volume (mL)
ELAPRASE solution needed

('patient weight' kg × 0.5 mg/kg) / 2 mg/mL 3 mL

= number of vials required

Recommended dose: 0.5 mg/kg

Concentration: 2 mg/ml

Volume per vial: 3 ml

Patient weight: 21 kg

Step 1: 21 kg × 0.5 mg/kg = 10.5 mg

Step 2: 10.5 mg ÷ 2 mg/ml = 5.25 ml

Step 3: 5.25 ml ÷ 3 ml/vial = 1.75 vials

Step 4: Withdraw 5.25 ml using 2 vials

Step 5: Dispose of unused product

References: 1. Elaprase Saudi Summary of Product Characteristics, April 2021

C-APROM/SA/ELA/0042 Preparation Date: 11-Jan-2026