Imipenem 1g Dilution Volume
A 1-gram vial of imipenem/cilastatin should be reconstituted with approximately 10 mL of diluent, then transferred to 100 mL of normal saline for intravenous infusion 1.
Reconstitution and Preparation Steps
The FDA-approved preparation process is as follows:
Initial reconstitution: Add approximately 10 mL of appropriate diluent (0.9% sodium chloride, 5% dextrose, or combinations) to the vial 1
Shake well to create a suspension
Transfer to infusion bag: The reconstituted suspension must be transferred to 100 mL of an appropriate infusion solution 1
Complete the transfer: Use an additional 10 mL of infusion solution to rinse the vial and ensure complete transfer of contents 1
Agitate until clear before administration
Critical Safety Points
Never administer the reconstituted suspension by direct intravenous infusion - it must first be diluted in the 100 mL infusion solution 1
Avoid benzyl alcohol-containing diluents in neonates due to toxicity risk 1
The final solution should range from colorless to yellow; color variations within this range do not affect potency 1
Infusion Parameters
- Doses ≤500 mg: Infuse over 20-30 minutes 1
- Doses >500 mg (including 1g): Infuse over 40-60 minutes 1
- If nausea develops during infusion, slow the rate 1
Stability Considerations
Once reconstituted and diluted, the solution maintains potency for:
- 4 hours at room temperature
- 24 hours under refrigeration (5°C)
- Do not freeze 1
This preparation method ensures proper drug delivery while minimizing the risk of administration errors and maintaining drug stability.