My son (13 years) has been suffering from migraines for around a year. He takes imitrex pills but until recently, they are taking along time to work and have not been helping as well. The dr has prescribed imitrex injections and we are going to the parks starting tomorrow. Anyone know how I can keep the injectibles from not getting to 100 degrees while while they are in my backpack? I know pills are much more easier to store but a liquid medication is more effected by the heat. Thanks for any help.