Active Pharmaceutical Ingredients (API) are active constituents used in the manufacturing of pharmaceutical formulations and have a pharmacological and therapeutic effects on the body. API constitutes the main ingredient, which helps cure the disease or disorder. APIs provide health benefits and are used in disease diagnosis, prevention, and treatment. APIs cannot be used in the raw form because it is the crude form of drug, which will not meet the appropriate pharmacodynamics and pharmacokinetics parameters. APIs are thus combined with the suitable excipients which are pharmacologically and therapeutically inactive but enhance its stability and activities.