Homeopathy is a medical system that was developed in Germany more than 200 years ago. It’s based on two unconventional theories:

• “Like cures like”—the notion that a disease can be cured by a substance that produces similar symptoms in healthy people.
• “Law of minimum dose”—the notion that the lower the dose of the medication, the greater its effectiveness. Many homeopathic products are so diluted that no molecules of the original substance remain.

Homeopathic products come from plants (such as red onion, arnica [mountain herb], poison ivy, belladonna [deadly nightshade], and stinging nettle), minerals (such as white arsenic), or animals (such as crushed whole bees). Homeopathic products are often made as sugar pellets to be placed under the tongue; they may also be in other forms, such as ointments, gels, drops, creams, and tablets. Treatments are “individualized” or tailored to each person—it’s common for different people with the same condition to receive different treatments. Homeopathy uses a different diagnostic system for assigning treatments to individuals and recognizes clinical patterns of signs and symptoms that are different from those of conventional medicine.

How Does It Work?

A basic belief behind homeopathy is “like cures like.” In other words, something that brings on symptoms in a healthy person can — in a very small dose — treat an illness with similar symptoms. This is meant to trigger the body’s natural defenses.

For example, red onion makes your eyes water. That’s why it’s used in homeopathic remedies for allergies. Treatments for other ailments are made from poison ivy, white arsenic, crushed whole bees, and an herb called arnica.

Homeopathic doctors (who also are called “homeopaths”) weaken these ingredients by adding water or alcohol. Then they shake the mixture as part of a process called “potentization.” They believe this step transfers the healing essence. Homeopaths also believe that the lower the dose, the more powerful the medicine. In fact, many of these remedies no longer contain any molecules of the original substance. They come in a variety of forms, like sugar pellets, liquid drops, creams, gels, and tablets.

During your appointment, a homeopath will ask a number of questions about your mental, emotional, and physical health. They’ll prescribe the remedy that best matches all of your symptoms. Then they’ll tailor the treatment for you.

You can also buy over-the-counter homeopathic remedies at drugstores and health food stores. The dosage and quality of these products depend on the manufacturer.