What is the function of benzyl alcohol in some sterile compounded preparations?

Benzyl alcohol serves an important function as a preservative in sterile compounded preparations. It helps to inhibit the growth of bacteria and fungi, thereby extending the shelf life of the product. This characteristic is especially valuable in multi-dose vials, where the potential for contamination over multiple uses is a concern.

In addition to its preservative properties, benzyl alcohol is also known as a solvent and is utilized in formulations to dissolve other ingredients, enhancing their efficacy. However, it is not primarily used as a primary active ingredient, thickening agent, or flavoring agent in sterile compounding. The presence of benzyl alcohol is crucial for maintaining the integrity and safety of the compounded preparation, ensuring that it remains effective and free from harmful microbial growth during its intended shelf life.