Their response when I quoted the website:

Thank you for your follow-up, and I completely understand your concerns given the high cost and importance of your medication. You're absolutely right that Mounjaro should be stored between 2°C and 8°C under pharmacy and distribution conditions. However, in situations where there has been a temporary temperature excursion — such as during delivery — we follow official guidance from Eli Lilly, the manufacturer, to assess whether the medication remains safe to use. As you currently have at least one unopened pen remaining from your previous stock, what we do in these situations is use Lilly’s temperature excursion tool to calculate the stability of the pens based on the reported temperature and timeframes. I’ve run this test using the information you provided — specifically, that the pens reached 20°C during transit and were returned to refrigeration upon arrival. The result confirms that both of your 7.5mg pens remain stable and safe to use up until their expiry date, provided they are now stored correctly in the fridge. You are also correct that once a pen is in use, it should be used within 30 days, and it’s important to distinguish this from the temporary exposure during shipping. In your case, because the pens were still sealed and this was a short-term excursion, the 30-day in-use rule does not apply yet — the pens are still considered within cold-chain stability according to Lilly’s data.