Common hawthorn (Crategus monagyna) is a shrub common in Eurasia and northern Africa, its medicinal raw material are: inflorescence with leaves (Inflorescentia crataegi) and fruit (Fructus crataegi), a rich source of flavonoids, amines, compounds purine and terpene, organic acids (e.g.. coffee, chlorogenic), esculin (that belongs to the coumarins), and vitamin C. Preparations of common hawthorn are widening coronary vessels, increasing blood flow (while reducing pulse) supply oxygen to the heart muscle. They have a strengthening effect on the heart, regulating blood pressure and intracellular tension of heart muscle, calming the nervous system, antispasmodic for intestinal smooth muscle, uterine and vascular, pain relievers. Flavonoids have an impact on the nutrition of brain cells. A special and useful feature is slow and gentle action, ensuring the effectiveness and lack of side effects. Supplements containing medical materials of Crataegus monogyna.