Taking Niu Huang Qing Stomach Pill will not usually cause the tongue to turn yellow, and yellow tongue is a sign of heat. The efficacy of Niu Huang Qing Stomach Pills is to clear heat and drain fire, which will not lead to the appearance of heat, and can be considered to be due to other reasons. Niu Huang Qing Stomach Pill is mainly composed of artificial niu huang, maitong, petunia seeds, chrysanthemum, rhubarb, gypsum, gardenia, tangerine, mint, scutellaria, licorice, xuan shen, senna, forsythia, cypress, hedge hedgehog, ice and other drugs. It has the effects of clearing stomach and diarrhea (removing stomach fire), moistening dryness and laxative. This product is often used to treat symptoms such as swollen and painful gums, dizziness and headache, sore throat, mouth and tongue sores, and short and red urine (small amount of urine with dark yellow color). The adverse effects of Niu Huang Qing Stomach Pill have not been clarified, and pregnant women should not take this medicine. Patients with yellow tongue coating are usually hot, but this medicine belongs to the category of heat-cleansing medicines, and taking this medicine will not produce the evil of fire and heat. It is possible that the coloring of the pills when taking the pills, you can gargle with water. If it is still yellowish after gargling, you can go to the hospital. The use of drugs need to be under the guidance of a physician, if the body is not feeling well, it is recommended to go to the hospital in time.