This document provides an overview of homeopathy as a medical system. It discusses the history and principles of homeopathy beginning with Hippocrates and Paracelsus. Samuel Hahnemann is credited with formally establishing homeopathy in the late 18th century based on the principles of similia similibus curentur and potentization. The document outlines homeopathy's pharmacology including source of medicines, methods of potentization, and common forms of administration. It also summarizes research that has been conducted on homeopathy, showing evidence of its effectiveness in treating various conditions including respiratory infections and its success in epidemic settings.