Components of a drug

Any drug is composed of two components or aspects. The first is the actual API or Active Pharmaceutical Ingredients, which is the central ingredient. The second is known as an excipient. This refers to the substance inside the drug or tablet. If it is in syrup form, then the excipient will be the liquid that has been used. Thus, excipients are the inactive or inert substances present inside a drug while the Active Pharmaceutical Ingredients is the chemically active substance, which is meant to produce the desired effect in the body.