Homeopathy is a method of natural healing based on the concept "likes cure likes," but expands to include much more than a single concept. Remedies are made from various substances that go through a process of many dilutions. More information can be for at
The Society of Homeopaths

Remedies can be purchase all over the web. A main stream homeopathic remedy is "Zicam cold remedy," which can be purchased practically anywhere. Remedies are available in many different forms and potencies. I recommend getting a kit to add to your survival gear.

A homeopath should be consulted for many chronic or serious cases, but a layman can help himself with the aid of homeopathic handbook. A really easy to use handbook is "The Complete Homeopathy Handbook" by Miranda Castro. It is easy to read, very informative, has a guide to use homeopathic remedies, and includes ten case studies.