How to store Aldesleukin?

The vials should be stored in a refrigerator at 2 C to 8 C (36 F to 46 F ) before and after reconstitution with diluent. The vials should not be frozen. The solution should be brought to room temperature prior to infusion and used within 48 hours of reconstitution. Since the vials do not contain a preservative, any unused portion must be discarded.

Source: http://www.nlm.nih.gov