Read the package I think you have to use it within two weeks. It may be a month.

I use 70/30 novalog I have a question also does it have to be kept cold or can you carry it with you

I don't need it anymore. But I believe a month after you start using it.

I use novalog 70/30 I pay 8.30 for my subscription use 24 units 2x daily , my question is can it be left our or does it require refigatation ?