Keep It Cool ( Diabetes )
The vials of insulin that you are using right now should be left at room temperature and away from heat sources and light. Don’t leave insulin in your car where it can become hot or cold very quickly. If you take insulin with your food, you need to keep that insulin with you. You probably don’t need to carry an insulin cooler. Your pocket or purse will work just fine (just don’t leave it some place that’s very warm or cold), since modern insulin is stable for at least one month at room temperature.
You should keep unopened vials of insulin in the refrigerator but never in the freezer. However, don’t put the vials in the refrigerator door, because the jarring movements of the door may lower the activity of the insulin. Try to keep your insulin on a low shelf in the refrigerator so it doesn’t run the risk of freezing. Always examine your insulin before injecting it. Do not use insulin that is past the expiration date on the label and do not use insulin that is discolored or has clumps in it.