And never leave your insulin in an insulated container in your car. Also, be sure not to let insulin freeze. So when you pack for the road, keep the insulin away from direct contact with the cold pack, if you can. If you follow this practice, be sure to dispose of insulin after one month, which is the manufacturer's guideline. Insulin kept at room temperature loses potency after about a month.
Refrigeration is still best for long term storage of unopened insulin vials.
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