Of soft medicines for external use, ointments are most often used, which consist of an ointment base and a medicinal substance evenly distributed in it. Ointments are soft medicines for topical use, the dispersion medium of which, at a set storage temperature, has a non—Newtonian type of flow and high values of rheological parameters. They are highly viscous liquids capable of forming a smooth continuous film on the surface of the skin or mucous membrane. Ointments are the official dosage form intended for application to the skin, wound or mucous membranes. Despite the fact that ointments belong to the oldest medicinal forms mentioned in the Ebers papyrus, the works of Hippocrates, Galen and Avicenna, they have not lost their significance today, in modern medicine.