First aid kit for road trips, what should I pack?

Generic roadside kit. One of the easiest ways to stay safe on the road is to buy a generic roadside kit and keep it safe in your trunk. You also can you can customize it to your individual needs.
Basics. Wipes, antiseptic cream, different size bandages, small roll of gauze and adhesive tape, small scissors. Ibuprofen and Tylenol (acetaminophen). Tweezers. Maybe add Cortaid. and Benadryl. 2 safety pins. Add / subtract as needed. non-latex gloves.

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How do you properly store an instant cold pack in a first aid kit when the outside temperature is hot?

You really can't. Cold packs that need to be kept frozen are very inefficient in first aid kits. A better option is a "chemical" cold pack that becomes cold when the chemicals inside the bag are mixed (squeezed) together. These are available at medical supply stores and are not affected by temperature. The cooling from them lasts about 30 minutes. Read more...