Evidence-graded answer
How do you store GLP-1 pens?
Refrigerate unopened pens at 36-46°F (2-8°C) until first use. Once started, room temperature ≤86°F (30°C) is fine for up to 28 days. Never freeze; never store in direct sunlight; do not store in checked luggage.
Refrigerator: ideal for unopened pens; do not use pens that have ever been frozen (the protein denatures).
In-use room temperature: 28 days at ≤86°F. Many patients keep their active pen on the bathroom counter or kitchen drawer — fine, just avoid heat sources.
Travel: carry-on only (checked baggage hits freezing). Use an evaporative cooling wallet for trips longer than 4 hours unrefrigerated.
Source: Wegovy prescribing information, accessdata.fda.gov