Maximum Concentration of Levetiracetam for Infusion
The maximum concentration of levetiracetam that can be given as an infusion is 15 mg/mL, as specified in the FDA-approved formulation. 1
FDA-Approved Concentrations
The FDA label explicitly defines three available concentrations for intravenous administration 1:
- 5 mg/mL (500 mg in 100 mL single-dose bag)
- 10 mg/mL (1000 mg in 100 mL single-dose bag)
- 15 mg/mL (1500 mg in 100 mL single-dose bag)
These formulations should NOT be further diluted prior to use. 1
Standard Administration Parameters
The FDA label specifies that each single-dose bag should be administered intravenously over a 15-minute infusion period. 1 This represents the standard approved administration method for levetiracetam infusion.
Important Clinical Considerations
Rapid Administration Studies
While the FDA-approved maximum concentration is 15 mg/mL, recent evidence demonstrates that levetiracetam can be safely administered as a rapid IV push over 5 minutes with minimal adverse effects. 2 Studies show:
- Low incidence of hypotension (1.7-3.2%) and bradycardia (3.5-7.8%) with rapid administration 2
- Few adverse effects related to medication concentration or infusion speed 2
- 2500 mg IV over 5 minutes showed 83% seizure termination within 24 hours 2
Common Pitfall to Avoid
Do not attempt to concentrate levetiracetam beyond 15 mg/mL. The FDA-approved formulations come pre-mixed at the appropriate concentrations and are ready to use without further manipulation. 1 Any unused portion should be discarded. 1
Extended or Continuous Infusions
For critically ill patients with augmented renal clearance, extended infusions (4-6 hours) or continuous infusions may be necessary to achieve target concentrations, though these would still use the standard FDA-approved concentrations. 3 This approach focuses on prolonging infusion time rather than increasing concentration.