The role of APIs extends beyond just being a component in drug formulations. They significantly influence the pharmacokinetics and pharmacodynamics of a drug. The solubility, stability, and bioavailability of an API can affect how well a drug works, how it is absorbed in the body, and its overall therapeutic impact. Hence, drug formulation scientists invest significant effort into creating optimal combinations of APIs and excipients (inactive ingredients) to enhance the drug's performance.
Pharma APIs can be categorized into two primary types chemical APIs and biological APIs. Chemical APIs are typically synthesized through chemical processes in laboratories. These include small-molecule drugs, which are often small organic compounds designed for specific therapeutic effects. On the other hand, biological APIs, commonly referred to as biotech drugs, are derived from living organisms. They encompass a range of products such as monoclonal antibodies, peptides, and vaccines, which generally offer targeted therapies for complex diseases.