Good questions. Let me separate the branded product data from what we know about compounded formulations, because they differ.

Branded Ozempic (pre-filled pen):

• Unopened: Refrigerated (36–46°F / 2–8°C) until expiration date
• In-use: Can be stored at room temperature (59–86°F / 15–30°C) OR refrigerated for up to 56 days (8 weeks)
• Do not freeze. Do not expose to temperatures above 86°F / 30°C

Compounded reconstituted semaglutide (lyophilized powder + BAC water):

• Most compounding pharmacies label "refrigerate, use within 28–30 days"
• Stability at room temperature is less well-characterized but peptide stability data suggests reconstituted semaglutide in BAC water should be stable at room temperature (68–77°F / 20–25°C) for at least 48–72 hours without significant degradation
• The bacteriostatic water itself contains benzyl alcohol as a preservative, which helps prevent microbial growth at room temp

Heat exposure: Semaglutide is a peptide and peptides are sensitive to heat. Brief exposure (under 1 hour) to temperatures up to 104°F / 40°C is unlikely to cause clinically significant degradation. Prolonged exposure above 86°F / 30°C should be avoided. Never leave it in a hot car in summer — dashboard temperatures can easily exceed 140°F / 60°C.

^[1] Novo Nordisk. Ozempic (semaglutide) prescribing information. Revised 2022. Section 16 — How Supplied/Storage and Handling.

I travel 3 weeks out of every month. Here's my setup:

• FRIO cooling wallet — these use evaporative cooling (you soak them in water) and keep contents 40–50°F below ambient temperature for 24–48 hours. No ice needed. I've used one for 2 years with zero issues.
• If I'm going somewhere hot, I bring a small insulated bag with a gel ice pack for the flight. TSA has never given me trouble with a medication cooling bag.
• At the hotel, I put the vial in a ziplock bag and put it in the mini-fridge (NOT the freezer compartment). If there's no mini-fridge, the FRIO wallet in the room is sufficient for 2–3 nights.
• I inject the morning I leave or the evening I arrive if possible, so the vial spends the least time in transit.

Haven't noticed any reduction in efficacy in 2 years of this approach.

Previously posted:

peptide stability data suggests reconstituted semaglutide in BAC water should be stable at room temperature (68–77°F / 20–25°C) for at least 48–72 hours without significant degradation

This is exactly what I needed to know. So for a typical 2-day business trip where the hotel is air-conditioned (probably 68–72°F), the vial should be fine without any special cooling? That simplifies things enormously.

For a 2-day trip in an air-conditioned environment, yes, the risk of meaningful degradation is very low. The peptide bond stability at room temperature is well within that timeframe. Just don't leave it on a sunny windowsill or in a car.

The bigger concern for longer trips is microbial contamination rather than chemical degradation. Each time you puncture the vial stopper, you introduce a small contamination risk. Bacteriostatic water mitigates this, but refrigeration helps suppress any microbial growth. For trips over 72 hours without refrigeration, I'd recommend the FRIO wallet or similar cooling solution mentioned above.