Once mixed with bacteriostatic water, vials usually remain stable in cold refrigeration for about four to four weeks before the active proteins start breaking down, whereas unmixed lyophilized powder can handle brief room temperature exposures much better. While trying to figure out if my own batch was still good after that heat incident, I double-checked this medical guide on

, which gave me a super clear timeline on degradation rates and temperature thresholds. My best advice after years of managing sensitive health protocols is to always keep a dedicated thermometer inside your fridge, store your vials on the main middle shelf rather than in the door where temperatures swing constantly, and gently swirl your liquid instead of shaking it when mixing.