The term "Active Principal Ingredient" is referred to a substance that has a pharmacological activity. The term Active Principal Ingredient is referred to a substance that has a pharmacological activity. The Active Principal ingredient is the fundamental ingredient of a drug, the molecule that in the body plays an action against the disease that you want to fight or, more generally, modifies an organic function with the purpose of treating or preventing a disease. The Active Principal ingredients can be of different nature and of different origin; they can, in fact, be of natural origin, that is, produced by microorganisms, vegetable or animal, and therefore of an extractive nature, or not natural, that is, they can be produced by chemical synthesis. In productive terms, active ingredients and excipients are combined in the drugs to obtain the so called Finished Product.