Here is one opinion from a manufacturer. Refrigerators can be moist and lead to condensation so it is not always the best place to store powders.
Storage Before Reconstitution
Saizen® should be stored at room temperature (59°–86°F/15°–30°C). Expiration dates are stated on the labels.
Storage After Reconstitution
Saizen® 5 mg and 8.8 mg vials reconstituted with the Bacteriostatic Water for Injection, USP (0.9% Benzyl Alcohol) provided should be stored under refrigeration (36°–46°F/2°–8°C) for up to 14 days.
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