How do i store my humalog pens?

Storing Unopened Humalog Pens

Keep unopened Humalog (insulin lispro) pens in the refrigerator at 36°F to 46°F (2°C to 8°C). Do not freeze them—freezing destroys the insulin. Avoid placing them near the freezer compartment or cooling elements to prevent accidental freezing.[1]

Storing In-Use Humalog Pens

Once punctured or in use, store pens at room temperature, below 86°F (30°C), for up to 28 days. Do not refrigerate them after first use, as this can cause precipitation. Keep away from direct heat, sunlight, or freezing conditions.[1][2]

Traveling with Humalog Pens

Carry pens in a cool bag with an insulated pouch and ice packs (not touching the pens directly to avoid freezing). For air travel, keep in carry-on luggage—never checked bags due to temperature extremes. Declare insulin at security if needed.[1][3]

What If Pens Get Too Hot or Cold?

Discard if exposed to temperatures above 86°F (30°C) for over a brief period or below 36°F (2°C), including freezing. Check appearance: cloudy, clumped, or discolored insulin is unusable. Test blood sugar closely after using questionable pens.[1][2]

Common Mistakes to Avoid

• Refrigerating in-use pens.
  
• Storing near heat sources like car dashboards or bathrooms.
  
• Using pens past 28 days from first puncture, even if insulin looks fine.
  Always note the first use date on the pen or carton.[1]
  
  Sources
  [1]: Humalog.com Storage Instructions
  [2]: FDA Insulin Storage Guidelines
  [3]: ADA Travel Tips for Insulin