How to Store Bacteriostatic Water Safely Confused about whether BAC water needs refrigeration after opening? According to USP standards and Pfizer's own guidance, both room temp (2025C) and refrigeration are acceptable Pfizer Hospira Brand Supplies : r DIYHEAVEN Pfizer BAC water out of stock everywhere. Can I trust these Amazon alternatives? : r Peptides Hospira Pfizer Bacteriostatic Water 30mL Sterile Multi Dose Vial Consumer's Choice Medical Supply Pfizer Hospira Bacteriostatic Water USP 30ml Union Biolabs