Q. Why do generic medicines often cost less than the brand-name medicines?

Generic pharmaceuticals are approved only after a rigorous review by regulators and after a set period of time that the brand product has been on the market exclusively. This is because new drugs like other new products are usually protected by patents that prohibit others from making and selling copies of the same drug. Generic drugs tend to cost less than their brand-name counterparts because generic drug applicants do not have to repeat animal and clinical (human) studies that were required of the brand-name medicines to demonstrate safety and effectiveness.