Cardiology
Diltiazem (Cardizem) IV Bolus, Infusion Rate & Oral Transition Calculator
Calculates weight-based IV boluses (0.25 & 0.35 mg/kg), infusion rate (5–15 mg/hr), and oral transition dosing for AFib RVR.
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Parameters
Diltiazem (Cardizem) IV Bolus, Infusion Rate & Oral Transition Calculator Result
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Formula
Initial Bolus: 0.25 mg/kg IV over 2 min (max 25 mg)
Repeat Bolus (after 15 min): 0.35 mg/kg IV over 2 min (max 35 mg)
Infusion Rate: 5–15 mg/hr (Pump mL/hr = Target mg/hr ÷ Bag Concentration mg/mL)
Oral Maintenance Conversion ≈ IV Rate (mg/hr) × 24 × 1.35Clinical Pearls
The premier bedside acute rate control protocol for emergency departments and cardiac stepdown units.
Limitations
Contraindicated in Wolff-Parkinson-White syndrome with pre-excited AFib and severe systolic heart failure (LVEF < 40%).