Stability of Epinephrine in a Normal Saline Solution

Area of Science:

• Pharmacology
• Clinical Pharmacy
• Emergency Medicine

Background:

• Diluting concentrated epinephrine for intravenous use in emergencies can cause delays.
• Ensuring the stability and sterility of diluted epinephrine is crucial for timely patient care.

Purpose of the Study:

• To evaluate the stability and sterility of diluted epinephrine over time.
• To assess the impact of common hospital storage conditions on epinephrine quality.

Main Methods:

• Epinephrine samples were prepared using double dilution techniques.
• Samples were stored in 10-mL syringes under varied temperature and lighting conditions for up to 90 days.
• Stability was assessed using capillary zonal electrophoresis, and sterility was tested via blood agar cultures.

Main Results:

• Diluted epinephrine samples demonstrated stability for the entire 90-day study period across all tested conditions.
• No bacterial contamination was detected in any samples, irrespective of storage duration or environment.

Conclusions:

• Diluted epinephrine can be considered clinically useful for up to 90 days when stored under simulated hospital conditions.
• This extended stability can improve medication accessibility, patient safety, and reduce healthcare costs by minimizing drug waste.