Unopened Admelog (insulin lispro injection) should be stored in the refrigerator (36°F to 46°F or 2°C to 8°C) until the first use. Once you have opened the Admelog vial or Solostar pens, you can store them at room temperature (below 86°F or 30°C), but they must be used within 28 days or thrown away (discarded), even if they still contain medicine. Do not store the Admelog Solostar pen in the refrigerator once in use.