Should BAC water be refrigerated or stored at room temperature? How to Safely Mix Medications with Bacteriostatic Water? How Long Does Bacteriostatic Water Last After Opening Wittmer Rejuvenation Clinic 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 RETA & BAC WATER MIXING, UNITS, MG WHAT IT MEAN?!