Inclusion complexes are formed when one molecule, known as the host, encapsulates another molecule, called the guest, within its structure. This interaction often occurs in a way that the guest is not chemically bonded to the host but is instead held in place by non-covalent forces, such as hydrogen bonds or van der Waals forces. These complexes are commonly found in various fields, including chemistry and pharmaceuticals. For example, cyclodextrins are a type of host molecule that can form inclusion complexes with drugs, enhancing their solubility and stability. This property is useful for improving the delivery and effectiveness of medications.