Integrilin (Eptifibatide) Dosing
For patients undergoing PCI, administer eptifibatide as a 180 mcg/kg IV bolus followed 10 minutes later by a second 180 mcg/kg bolus, with a continuous infusion of 2.0 mcg/kg/min for 12-18 hours. 1, 2
Standard Dosing Regimen
For PCI (Percutaneous Coronary Intervention)
Loading Dose:
- 180 mcg/kg IV bolus
- Second 180 mcg/kg IV bolus given 10 minutes after the first bolus
- This double-bolus regimen prevents the early decline in drug levels that occurs with a single bolus 3
Maintenance Infusion:
- 2.0 mcg/kg/min continuous IV infusion
- Start immediately after the first bolus
- Continue for 12-18 hours at physician discretion 1, 2, 4
For UA/NSTEMI (Medical Management)
Loading Dose:
- 180 mcg/kg IV bolus
Maintenance Infusion:
- 2.0 mcg/kg/min continuous IV infusion
- Continue until hospital discharge, CABG, or up to 72 hours
- If PCI is performed, continue for 24 hours post-procedure (allowing up to 96 hours total) 5, 6
Critical Dose Adjustments
Renal Impairment
For creatinine clearance <50 mL/min:
- Same bolus dose: 180 mcg/kg (no adjustment needed)
- Reduce infusion by 50%: Use 1.0 mcg/kg/min instead of 2.0 mcg/kg/min 1, 2, 3
This adjustment is essential because eptifibatide clearance is reduced by approximately 50% in renal insufficiency, leading to doubled steady-state plasma levels 3. Despite guideline recommendations, studies show that 34% of patients with reduced renal function fail to receive appropriately adjusted doses in practice 7.
Avoid in patients on hemodialysis 4
Obesity Considerations
For patients weighing >121 kg:
- Standard dosing caps the dose at 121 kg body weight
- However, research suggests this may provide inadequate platelet inhibition 8
- Consider using actual body weight for dosing in morbidly obese patients, though this is not yet standard practice
Clinical Context and Timing
When to Administer
During PCI:
- Give immediately before or at the time of PCI
- The benefit is of uncertain value if the patient already received a P2Y12 inhibitor (clopidogrel, prasugrel, or ticagrelor) 1, 2, 5, 6
Upstream (Pre-catheterization) Use:
- Not routinely recommended for all patients
- May be reasonable in high-risk patients (positive troponin, diabetes) who are at high thrombotic risk relative to bleeding risk 9, 10, 9, 10
- Avoid in patients >75 years old or those with normal troponin due to increased bleeding without clear benefit 9, 10, 9, 10
Concomitant Anticoagulation
Always administer with:
- Aspirin: 162-325 mg loading dose 1, 2, 4
- Heparin: Adjust UFH dose based on whether GP IIb/IIIa inhibitor is used:
Common Pitfalls
Dosing Errors to Avoid
Excessive dosing is common and dangerous 11:
- Do not exceed 180 mcg/kg per bolus
- Do not exceed 22.6 mg total per bolus in patients with normal renal function
- Do not exceed 2.0 mcg/kg/min infusion rate (or 15 mcg/hour total) in patients with CrCl >50 mL/min
- Do not exceed 1.0 mcg/kg/min in patients with CrCl <50 mL/min
Monitoring Requirements
- Check platelet count at baseline and monitor for thrombocytopenia
- Profound thrombocytopenia (median nadir 9,000 cells/mm³) can occur, requiring immediate discontinuation 12
- Monitor for bleeding complications, particularly in elderly patients and those with renal insufficiency
Duration Considerations
Recent evidence suggests that abbreviated infusions (<2 hours) after uncomplicated PCI may be non-inferior to the standard 18-hour infusion and associated with less bleeding 13. However, the standard 12-18 hour duration remains guideline-recommended 1, 2.