Biosimilar Medicines: From Development Process to Marketing Authorization by the EMA and the FDA

Biosimilars are a new category of medicines that have revolutionized the treatment of patients with life-threatening conditions, such as cancer and autoimmune diseases. A biosimilar is a biological product that is very similar to an already approved biological medicine that is used as its reference. These medicines go through less clinical studies than their reference product and therefore the cost of their development process is significantly lower, giving patients access to them more quickly and at a more affordable price. However, due to the structural complexity and inherent degree of variability of these products, it is very difficult to develop biosimilar medicines that are exactly the same as the reference product. Thus, it is extremely important to define strict controls to guarantee that these minor differences are not clinically significant in terms of safety and efficacy. Like any other medicine, biosimilars have to go through a complex approval process, which involves a thorough assessment by regulatory authorities to ensure these products meet the necessary standards of quality, safety, and efficacy before being placed on the market. Due to their nature and complexity, the approval process of biosimilar medicines contains some unique and specific considerations. This review aims to address the regulatory framework of biosimilar medicines, their development process and the approval requirements by the European Medicines Agency (EMA) and the Food and Drug Administration (FDA).