Very interesting questions and Brian points out that the information is not easy to find directly.
I know from experience that there is Third World Dumping, as it is called.
Whereby expired products or those with a limited shelf life, at best 30 prior to expiration hit the market here.
Developing countries are happy to have any source of pharmaceuticals and often will accept even expired products.
When I first started my insulin regimen with Novolin-R Insulin and NPH I was told by the pharmacist to be very careful about transport and keep it cool. Also I was warend to be sure to use it all within 30 days. Clearly I was not needing huge doses for a full vial per month. So it was a communication issue that really meant after 30 days discard the vials.
Now that I am on Novolog and Levemir I import a years supply at one time. Hand carried in a cooler myself and it is stored in the refrigerator. One vial of Humalog last year did seem to lose potency even refrigerated after 6 months. I only used that to rapidly bring down any spikes due to unexpected/unpredictable diet related issues or when a dental infection caused spikes.
Many pharmaceuticals as well as food items that should be stored cold, are frequently not during transport even if stored "properly" on arrival at the destination. Pharmaceuticals in developing countries are suspect in my book.