Licorice contraindications: 1. Licorice should not be taken for a long time or chewed as a sweetener (especially for children), which can increase blood sodium and increase potassium discharge, leading to hypertension, hypokalemia and clinical manifestations such as swelling and flaccidity. Licorice may also cause hypocalcemia if taken for a long time, resulting in calcium convulsions and other symptoms, leading to hyperalgesia and hypoadrenocorticism. 2, licorice has no obvious effect on kidney yin deficiency and kidney yang deficiency, so it is often used sparingly or not used in the formula of blood, yin and yang tonic. The treatment of qi stagnation, lifting and lowering imbalance, qi depression of the prescriptions do not use licorice. Because of licorice main diarrhea qi fire heat, for the treatment of blood heat in the cooling agent does not use licorice. 3, licorice should not be used with blood pressure drugs such as blood pressure, antihypertensive spirit, compound antihypertensive tablets. Because licorice can cause hypertension and hypokalemia, and blood pressure drugs such as blood pressure antagonistic. 4, licorice and cardiac glycoside western medicine together, can aggravate its toxic reactions, and hypoglycemic drugs such as insulin, d860, euglycemic drugs together, can produce mutual antagonism, weaken the effect of hypoglycemic drugs, and western drugs such as dihydrocoumaric acid diuretics, more likely to cause hypokalemia. 5, glycyrrhiza saponins in the hydrolysis of glycyrrhizic acid, its structure and function is similar to adrenocorticotropic hormone, if combined with aspirin, anti-inflammatory pain, pau tai pine and other drugs, can induce or aggravate ulcers. 6, licorice can not be eaten with carp, the same food is easy to poison. Anti-glycyrrhiza, dahurian, seaweed, coriander, which are Chinese herbs, should not be taken with these herbs. It is prohibited for those who are allergic to the ingredients of licorice tablets.