. St. John's wort Used for diseases of the nasopharynx, gastrointestinal tract, liver, kidneys, biliary dyskinesia, hepatitis, stagnation of bile in the gallbladder, cholecystitis, with the initial symptoms of cholelithiasis, gastritis. In dentistry, it is used as an astringent and anti-inflammatory agent; it is recommended to rinse the mouth with the tincture to eliminate bad odor, and also to lubricate the gums to strengthen them. Take 20 g of the plant per 100 ml of 70-proof alcohol.