API-Active Pharmaceutical Ingredients

The active pharma ingredients (API) are the part of any drug that produces the intended effects. Some drugs, such as combination therapies, have multiple active ingredients to treat different symptoms or act in different ways. API active pharmaceutical ingredients, are the term used to refer to the biologically active component of a drug product (e.g. pills, tablet, capsule). Drug products are usually composed of several components. The aforementioned API is the primary ingredient. Other ingredients are commonly known as "excipients" and these substances are always required to be biologically safe, often making up a variable fraction of the drug product. The procedure for optimizing and compositing this mixture of components used in the drug is known as formulation.

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