Dilute iron dextran formulation for addition to parenteral nutrient solutions

Area of Science:

• Pharmaceutical Sciences
• Clinical Pharmacy
• Drug Formulation

Background:

• Iron dextran is a common treatment for iron deficiency anemia.
• Understanding the stability of iron dextran in various preparations is crucial for safe and effective administration.
• Parenteral nutrient solutions are often co-administered with medications, necessitating stability assessments.

Purpose of the Study:

• To evaluate the stability of dilute iron dextran formulations.
• To assess the stability of iron dextran when added to parenteral nutrient solutions.
• To determine optimal storage conditions for iron dextran preparations.

Main Methods:

• Prepared seven dilute (50 mg/dl) iron dextran solutions and four parenteral nutrient solutions with iron dextran (100 mg/liter).
• Measured total iron and free ferrous ion content at intervals up to three months for dilute solutions (room temperature and refrigeration).
• Assessed parenteral nutrient solutions after 18 hours at room temperature.

Main Results:

• Four of seven dilute iron dextran solutions remained stable for two months.
• A simple dilute formulation (iron dextran, benzyl alcohol, sterile water) was stable for three months, with enhanced stability under refrigeration.
• Iron dextran was stable in all tested parenteral nutrient solutions after 18 hours at room temperature.

Conclusions:

• Dilute iron dextran formulations exhibit acceptable stability, particularly a simple formulation stored under refrigeration.
• Adding iron dextran to parenteral nutrient solutions does not appear to cause immediate stability issues.
• Further research on the impact of temperature, pH, light, and extended storage is recommended for comprehensive understanding.