Yes, common sense (store things in cool dry conditions) supported with evidence...
Providers have always known this, but share it sparingly with outsiders..."expired" drugs are retained and brought on care missions carried out in poor corners of the globe and dispensed and do the job they are meant to do.
Looks like good info to look over in more detail...
From the link -
https://www.documentcloud.org/documents/3525372-Stability-Profiles-of-Expired-Drugs.html