Sally, I"m not a moderator, but having purchased compounded pergolide for years for Tipperary from various compounding phamacies, I can say that all of them, with the exception of Thriving Pets, recommended keeping the pergolide  capsules in a room temperature environment. Prascend's package simply says to store below 77 degrees F. If you are using capsules, and order from an online compounding pharmacy, the having them delivered overnight is a safer way to go. 
Mixlab's website says they ship overnight for free. Unless you have a compounding pharmacy within driving distance, I would recommend using the overnight delivery service from whomever you order from. Yes, it's more expensive, but better than sitting in a mail truck for a week in the heat.
Dawn Wagstaff and Tipperary   

Saline, MI  2003

Tipperary Case History

Juniper Case history: https://ecir.groups.io/g/CaseHistory/files/Dawn%20and%20Juniper/Case%20history%20Juniper.pdf .