The way you’ll store Lantus varies based on a few factors, including whether you’re using Lantus vials or pens. For details, see the list below.
Unopened Lantus vials. You’ll store these in the refrigerator at a temperature of 36°F to 46°F (2°C to 8°C). You can store them this way until the expiration date on the package. You can also store unopened Lantus vials at a room temperature below 86°F (30°C) for up to 28 days. But be sure to throw them away after 28 days.
Opened Lantus vials. You’ll store opened Lantus vials in the refrigerator or at room temperature for up to 28 days.
Unopened Lantus SoloStar pens. You’ll store unopened pens in the refrigerator. You can store them this way until the expiration date on the package. Or you can store unopened pens at room temperature for up to 28 days.
Opened Lantus SoloStar pens. You’ll store opened pens at room temperature for up to 28 days. You should not put them in the refrigerator.
Do not ever freeze Lantus. Be sure to store vials and pens away from heat and light. And throw away any vials and pens that have been open for more than 28 days. Check out this article to learn about options for medication disposal. Also, talk with your pharmacist about safe ways to dispose of medications.