There is a 36-remedy homeopathic medicine kit that you can purchase for approximately $70 directly from the manufacturer at HELIOS KIT. It includes a booklet on which remedies to use listed by illness/complaint. Homeopathics are also available at most health food stores. Make sure to get the ones that deal with trauma, shock, and food poisoning, and familiarize yourself with how to use them.
Essential oils are essential medicine during times of crisis. Familiarize yourself with their use and buy the basics for your medicine kit.
My standard first-aid kit contains Thieves oil by Young Living or its equivalent, PuriFy by Ananda Apothecary.
Valerie Ann Worwood is a noted author on essential oils and specifies which oils to use for specific conditions as well as the best method of application. Her books also specifies which oils are safe for children of various ages. --an essential guide.
Essential oils can be purchased directly at health food stores, online via Amazon.com or AnandaApothacary.com, or through Young Living Essential Oil distributors.