personally, I would keep them in the fridge (not freezer) in a dark container if you can.
Basically, there are certain medications/drugs/chemicals...whatever you'd like to call them...out there that are required to remain at a certain degree ( whether it's room temp,cold, or freezing) in order to maintain said drugs effectiveness. In the case you are asking, for a peptide... it will need to be refrigerated to keep them at the state where they are effective for their intended use. When they get too hot or cold....chemical reactions take place (i.e. bonds breaking down) and the said drug could lose some or all of it's effectiveness.
Any that are unconstituted should be put in the freezer, but fridge is also acceptable.
When you are getting ready to inject your peptide, draw up your desired dosage, re cap your syringe, and then wait approximately 20-30 mins before injection. This is what we recommend for diabetics as well. Hope this helps.