Undoubtedly, most people have never heard about fluid bed dryers. However, where drying involves bulk materials such as granules, powders, plastics, among others, this is not a new terminology. What are fluid bed dryers? These are pieces of equipment that use a fluidization mechanism to dry materials. In this process, hot gas is released to the spaces surrounding solid parts and evaporates the moisture. Force is then used to suspend the particles to a state of a boiling fluid bed. Drying takes place when particles get into contact with the hot gas. Below, we explore the functionality of fluid bed dryers in the pharmaceutical industry.