Bacteriostatic Water for Injection (BWFI) is a sterilized water-based solution with 0.9% benzyl alcohol as a preservative, designed to inhibit bacterial growth. Unlike therapeutic drugs, it cannot be injected alone but serves as a critical solvent and diluent for injectable medications.

Its key uses include diluting high-concentration drugs like hormones, antibiotics, and growth factors to enhance absorption and reduce irritation. It also reconstitutes lyophilized powders, restoring their injectable form while maintaining stability. Ideal for multi-dose preparations—such as weekly hormone therapies or vaccine dilutions—it minimizes contamination risks during repeated use.

Users range from clinical staff and home-injection patients (e.g., diabetics, TRT recipients) to compliant fitness enthusiasts and veterinarians. Critical precautions: use sterile syringes, store in a cool, dry place, avoid intravenous injection, and discard opened bottles within 28 days. Allergic individuals should note the benzyl alcohol content. Click here to know more.