Neither janoshik nor I have said that rhGH in general, and certainly not reconstituted generic rhGH, can be left at room temperature without rapid degradation and potency loss.
Source:
What happens to dissolved HGH after 6 days at room temperature (22C)?
6 days at temperature controlled (22° C or 72° F) room.
Result: >40% purity (potency) loss
Insulin's also pretty unstable, for example, from the Humalog leaflet:
- Discard if product has been frozen
- Discard product if it contains particulate matter, is cloudy, or discolored
- Do not freeze
- Opened container can be stored for up to 28 days at temperatures < 30° C (86° F [controlled room temperature])
- Refigerate (2 - 8° C [35 - 46° F])