What is the fundamental difference between tonics and combinations in Chinese medicine pharmacy?

Tang Dosage is a liquid dosage form made by decocting or soaking the drug and then removing the dregs and extracting the juice. Soup is one of the earliest and most widely used dosage forms in China. Tang dosage adapts to the principle of traditional Chinese medicine's diagnosis and treatment, adding and subtracting according to the symptoms. Soup dosage has simple and easy preparation, fast absorption, and can quickly exert the effect of medicine. Combination refers to the concentrated decoction of traditional Chinese medicine compound, or traditional Chinese medicine extracts prepared with water as the solvent for internal liquid preparations. It can be categorized into solution-type compositions, suspension-type compositions, colloid-type compositions and emulsion-type compositions. Compositions are developed and improved on the basis of tonics, maintaining the characteristics of tonic medication, taking smaller quantities than tonics, and can be produced in batches, eliminating the need for temporary formulas and the trouble of decoctions.

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