Registered Nurses' Association of Ontario

Nursing Best Practice Guidelines

Insulin Storage Tips

Insulin in use is stable at room temperature for one month (check company monograph for temperature range).

  • Store insulin away from direct heat and sunlight.
  • Keep extra cartridges or vials of insulin in the fridge. When refrigerated, unopened insulin is good until the expiry date.
  • Always check the expiry dates.
  • Do not use your insulin if: (a) Clear insulin is not clear; (b) Cloudy insulin clumps and/or does not mix properly.

Store pre-filled syringes in the fridge, with needle tips up. They are stable for 1 month.
Roll end-to-end several times prior to use to re-suspend the insulin.