2, moistening the lungs and relieving cough. Hemp is also a Chinese herbal medicine that can moisten the lungs and relieve cough. It can enter the lung meridian and improve human lung function. People can take some anesthetics when they have bad symptoms such as lung heat, lung dryness, tracheal inflammation, cough and asthma. It can make the inflammation of human respiratory tract subside and the function of trachea and lung return to normal.