Different Sources of Drugs
Crude drugs are the drugs, which are obtained from natural sources. They should be used as such as they occur in nature without any processing except, collection, drying and size reduction. Crude drugs are also defined as drugs that have not been advanced in value or improved in condition by grinding, chipping, crushing, extracting, artificial mixing with other substances Crude drugs and their constituents are commonly used as therapeutic agents. Source of crude drugs are plant, animals and Minerals.