API: Active pharmaceutical ingredient 

     APIs (Active Pharmaceutical Ingredients): refers to a pharmaceutical active ingredient,which is what we usually refer to the API. 

     Q7A well-defined APIs in the: manufacture of drugs intended for any mixture of a substance or substances used. When used in the pharmaceutical and to become an active pharmaceutical ingredient. Such substances in the diagnosis, cure, mitigation, treatment, or prevention of disease have pharmacological activity or other direct effect, orcould affect the function or structure of the body.