What This Reblozyl Dosing Calculator Does Feature Description Indications Beta-Thalassemia and MDS (Myelodysplastic Syndromes) Weight-Based Dosing Supports kg and lb units Dose Titration Based on hemoglobin response and cycle number Starting Dose 1.0 mg/kg every 3 weeks for both indications Escalation Doses Thalassemia: up to 1.5 mg/kg; MDS: up to 1.75 mg/kg Vial Calculation 25mg and 50mg vial requirements Treatment Schedule 8-cycle dosing plan (24 weeks) Response Assessment Poor, Moderate, Good hemoglobin response
Dosing Protocols Indication Starting Dose Escalation 1 Maximum Dose Beta-Thalassemia 1.0 mg/kg 1.25 mg/kg 1.5 mg/kg MDS 1.0 mg/kg 1.33 mg/kg 1.75 mg/kg
Administration Schedule Parameter Details Frequency Every 3 weeks Route Subcutaneous injection Cycle Length 21 days (3 weeks) First Response Assessment After 2 cycles (6 weeks) Dose Interruption If hemoglobin >11 g/dL
Example Calculation Patient: 70 kg, MDS indication
Cycle Dose (mg/kg) Total Dose Vials Needed 1-2 1.0 70 mg 1×50mg + 1×25mg 3-4 (moderate response) 1.0 70 mg 1×50mg + 1×25mg 5-6 (poor response) 1.33 93 mg 2×50mg 7+ (if escalated) 1.75 122 mg 3×50mg
Dose Titration Guidelines Response Action Good (>2 g/dL increase) Continue current dose Moderate (1-2 g/dL increase) May increase after cycle 4 Poor (<1 g/dL increase) Increase dose at cycle 3
Hemoglobin Monitoring Level Action < 9 g/dL Continue treatment 9-11 g/dL Monitor, may continue > 11 g/dL Hold dose until decreases Excessive rise (>2 g/dL in 3 weeks) Interrupt dose
Vial Information Vial Size Reconstituted Volume Administration Volume 25 mg 1.0 mL 0.5 mL (12.5 mg) increments 50 mg 2.0 mL 1.0 mL (25 mg) increments
Important Clinical Notes Note Description ESA Refractory Reblozyl is indicated for ESA-refractory patients Ring Sideroblasts Particularly effective in MDS-RS patients Transfusion Burden Higher benefit in patients with high transfusion burden Thrombosis Risk Monitor for signs of thromboembolic events Hypertension Monitor blood pressure during treatment
How to Use Select Indication — Beta-Thalassemia or MDSEnter Patient Weight — in kg or lbs (toggle button)Enter Hemoglobin — current levelSelect Transfusion History — transfusion burdenSelect ESA Status — prior ESA treatment outcomeEnter Current Cycle — which treatment cycleSelect Response — hemoglobin response to therapyView Results — calculated dose, vial requirements, scheduleKeyboard Shortcuts Ctrl/Cmd + Enter — RecalculateCtrl/Cmd + R — Reset to defaultsMedical Disclaimer ⚠️ Important: This calculator is for educational and informational purposes only. Always consult the official Reblozyl (luspatercept) prescribing information and follow your institution’s protocols. Dosing decisions should be made by qualified healthcare professionals based on individual patient assessment.
