The terms "Branded," "Generic," and "Biosimilar" refer to different categories of drugs based on their origin, composition, and regulatory approval. These terms have specific meanings and implications within the healthcare and pharmaceutical industry in the United Kingdom (UK). Medicines Optimisation seeks to understand the importance for healthcare professionals and patients regarding the differences between branded, generic, and biosimilar drugs in order to make informed decisions about treatment options specifically their safety, quality, effectiveness, and finally cost.