Compound:

The rhizomes of valerian contain various macro- and microelements, with selenium and iron predominating. In addition to inorganic substances, valerian roots contain a number of organic compounds (acids, alkaloids, alcohols and their derivatives), which have high biological activity and determine the pharmacological action of valerian preparations.

Source: https://indasad.ru/lekarstvennye-rasteniya/3513-koren-valeriany-lechebnye-svojstva-i-protivopokazaniya

The valerian plant is useful in its entirety, but the largest part of the useful substances is contained in the root, which is why it is used for medical purposes much more often than the above-ground part.

Valerian has a positive effect on the digestive system , normalizes bowel function and increases bile secretion. It is often used in complex treatment of the liver, gall bladder, as well as esophageal spasms, flatulence and constipation. Valerian officinalis also has a good effect on the cardiovascular system. It is prescribed for tachycardia, coronary circulation disorders, early stages of angina and heart pain. The plant improves blood circulation, dilates blood vessels and improves heart function. Regular intake of valerian helps in the treatment of hypertension, especially in the early stages.

However, the main effect of valerian is sedative. It calms well, helps restore emotional balance , reduces anxiety, relieves headaches and increases efficiency. Products made from it relieve neuroses, hysteria, nervous overexcitement and insomnia, and valerian baths make capricious babies calmer. In addition, valerian is used for epileptic attacks, bronchial asthma, neurodermatitis and pneumonia.

Source : https://polzavred.ru/valeriana-polza-i-poleznye-svojstva-valeriany.html

Contraindications and harm to the body

There are not many contraindications to treatment with valerian preparations. Enterocolitis is a categorical contraindication. Rarely, but sometimes individual patients have individual intolerance – in this case, valerian preparations are not prescribed. When treating, it is necessary to take into account that valerian promotes increased blood clotting, so it should be used very carefully by people with elevated prothrombin levels. Recommendations from the attending physician are the surest way to prevent undesirable consequences during treatment, including from the use of valerian.

Source: https://indasad.ru/lekarstvennye-rasteniya/3513-koren-valeriany-lechebnye-svojstva-i-protivopokazaniya