How long is Zepbound safe in transit for in terms of temperature?

I know that Zep should be refrigerated immediately upon arrival when shipped from a pharmacy to my house. I placed an order while I was out of town, will be home by 6am Sunday. I ordered it on Friday assuming it wouldn’t be processed and delivered in under 48 hours but I was wrong. With that being said, how long is Zepbound supposed to be “safe for” in shipping? Is it only meant to withstand 24 hours, 48? 72? If it shipped on Friday evening and then sits in my mailroom until 6am Sunday is that too long of a duration for it to not be formally refrigerated?