How Often Do You Feed Your Puffer? in the Puffers forums, part of the Freshwater Fish Forums category.
For other uses, see API (disambiguation). In computer programming, an Application Programming Interface (API) is a set of subroutine definitions, protocols, and tools for building application software. In general terms, it is a set of clearly defined methods of communication between various software components.
While API is the active component of a drug, excipients are the inactive or inert substances present in a drug. An API starting material, usually a defined chemical property purchased in the market place or produced in-house, is used in the production of an API.