Hawthorn is not toxic and can be used for a long time, although the dosage still needs to be observed. Hawthorn acts as a vasodilator, antispasmodic, increases blood supply to the heart and brain, has a weak diuretic effect, lowers cholesterol in the blood, lowers the permeability of the walls of blood vessels and capillaries. The infusion of flowers and fruits improves sleep, the general condition of the body and heart function. The plant is used for heart defects, relieves spasms of blood vessels, is used in the recovery period after a serious illness. The tincture of the fruits of prickly hawthorn has a tonic effect on the heart, especially in old age, with overstrain. Homeopaths call hawthorn a cure for the old heart, it strengthens the heart muscle, relieves heart pain and other symptoms associated with heart disease, and the Germans call it - heart bread. An extract of prickly hawthorn has an overwhelming effect on the herpes virus. Fruits and flowers are used for edema, increased thyroid function, epilepsy, allergic diseases, obesity, rheumatism. Fresh flower juice improves the supply of blood and oxygen to the heart. Hawthorn is very useful in diabetes mellitus, it is able to regulate blood sugar and is also effective in gastritis. The fruits of hawthorn contain many vitamins C and other useful substances, it is used to reduce immunity. It has a beneficial effect on the functioning of the brain, clarity of thought appears, and memory improves. In Tibetan medicine, hawthorn is used as a choleretic agent in diseases of the liver and biliary tract.