Drug is a substance which is taken internally and externally to cure diseases.
যে সকল দ্রব্য মানবদেহে প্রবেশ করলে উক্ত দ্রব্যের গুণগত সত্ত্বার মাধ্যমে শরীরে প্রক্রিয়াশীল হয়ে শরীরে আগত অস্বাভাবিদ অবস্থাকে স্বাভাবিক করে ব্যাধিমুক্ত করে এবং অন্যদের রোগ উৎপন্ন করে না, ইহার নাম ওষধ।
The study or use of medicinal herbs to prevent and treat diseases and ailments
or to promote health and healing.
A drug or preparation made from a plant or plants and used for any of such purposes.
Plants have been used for medicinal purposes for as long as history has been recorded.
Use of natural plant substances (botanicals) to treat and prevent illness. The practice has existed since prehistoric times and flourishes today as the primary form of medicine for perhaps as much as 80% of the world’s population. Over 80,000 species of plants are in use throughout the world.
Herbs may be used directly as teas or extracts, or they may be used in the production of drugs. Approximately 25% of the prescription drugs sold in the United States are plant based. Many more herbal ingredients are present in over-the-counter drugs, such as laxatives. Medicines that come from plants include aspirin from willow bark (Salix species) and digitalis from foxglove (Digitalis purpurea).
Scientific interest in herbal medicine in the United States has lagged behind that in the countries of Asia and W Europe; in Germany, for example, one third of graduating physicians have studied herbal medicine, and a comprehensive therapeutic guide to herbal medicines has long been published there. Nonetheless, millions of people in the United States use herbal products to treat a wide variety of ailments or to enhance health. Among the more popular remedies used are ginseng, to increase stamina and as a mild sedative; St.-John’s-wort, for mild depression; Echinacea, to aid the immune system and alleviate colds; kava, to calm anxiety
and treat insomnia; saw palmetto, for enlarged prostate; and ginkgo biloba, to improve short-term memory (see ginkgo). Some people have used botanicals in an attempt to stave off serious illnesses such as AIDS.
A great variety of plants are used for medicinal treatments. Either the dried plant, or a specific part of it (root, leaves, fruit, flowers, seeds), is formulated into suitable preparations compressed as tablets or made into pills, used to make infusions (teas), extracts, tinctures, etc., or mixed with excipients to make lotions, ointments, creams, etc. 😀