Herbal Remedies (and herbal medicine) is use of plants for medicinal purposes, and the study of such use. Plants have been the basis for medical treatments through much of human history, and such traditional medicine is still widely practiced today.
Modern herbal medicine
The World Health Organization (WHO) estimates that 80 percent of the population of some Asian and African countries presently use herbal medicine for some aspect of primary health care. Pharmaceuticals are prohibitively expensive for most of the world’s population, half of which lives on less than $2 U.S. per day.
In comparison, herbal medicines can be grown from seed or gathered from nature for little or no cost.
Many of the pharmaceuticals currently available to physicians have a long history of use as herbal remedies, including opium, aspirin, digitalis, and quinine.
According to the World Health Organisation, approximately 25% of modern drugs used in the United States have been derived from plants.
At least 7,000 medical compounds in the modern pharmacopoeia are derived from plants.
Among the 120 active compounds currently isolated from the higher plants and widely used in modern medicine today, 80 percent show a positive correlation between their modern therapeutic use and the traditional use of the plants from which they are derived. more at Wikipedia