Banlangen tastes bitter and cold, and enters the heart, stomach, liver and gallbladder. Has the functions of clearing away heat and toxic materials, cooling blood and relieving sore throat. Indications are diseases caused by warm toxins, such as influenza, upper respiratory tract inflammation, meningitis, mumps, acute enteritis, bacillary dysentery, hepatitis, erysipelas on the face, fever spots, etc. Although pharmacological research shows that Radix Isatidis has obvious inhibitory effect on many viruses and germs, don't forget that it is a bitter cold medicine. Therefore, for the above diseases, it can only be used when there are symptoms of warmth, heat toxicity and damp-heat accumulation.

1, Banlangen for influenza: 50 grams of Banlangen and 25 grams of Notopterygium. Decoct soup twice a day for two to three days. (Selected prescriptions of Jiangsu)

2, Banlangen treatment of meningitis: Banlangen, Banlangen decoction, has a strong killing effect on meningococcus. Decocting Folium Isatidis, Radix Isatidis (25g each) and Radix Glycyrrhizae (15g) in water for 3-5 days has a good preventive effect on meningitis.

3. Radix Isatidis has been treated for a long time, with severe aversion to cold, edema in the head and face, inability to open eyes, dyspnea, sore throat, thirst and dry tongue: Scutellariae Radix (stir-fried with wine), Coptidis Rhizoma (stir-fried with wine) 25g, Pericarpium Citri Tangerinae (stir-fried), Radix Glycyrrhizae (raw), Radix Scrophulariae 10g, Fructus Forsythiae, Radix Isatidis, and Lasiosphaera. For soup, take it from time to time, or mix honey into pills and melt it. (Gaoli, Puji Disinfection Beverage)

4, Banlangen cure pinkeye: 30 grams of Banlangen, 9 grams of dandelion, 6 grams of raw licorice, decoction, can prevent pinkeye. 9 grams of dandelion, 6 grams of wild chrysanthemum, 9 grams of isatis root and 3 grams of coptis root, decocted in water, smoked and washed 3-4 times a day, which has a good effect on treating fulminant pinkeye.

5, Banlangen to prevent mumps: 50 grams of Banlangen and Lentinus edodes, 40 grams of forsythia, 30 grams of licorice, 5 grams of indigo naturalis (oral). Soak the medicine in water for half an hour, put it into a big casserole, add 800 ~ 1000 ml of clear water, fry it into 500 ml, divide it into 10 portions, and put it into small bottles.

6. Radix Isatidis is used to treat viral hepatitis: In epidemic period, Herba Artemisiae Scopariae, Radix Isatidis and Rhizoma Osmundae can be decocted in water 15g twice a day for prevention and treatment.

7. Banlangen cures hepatitis: 50 grams of Banlangen. Decoct with water. (Handbook of Common Chinese Herbal Medicines in Liaoning)

8, Banlangen treatment of mumps: 30 grams of Banlangen, decocted for 5 days, has a certain preventive effect. 30g of Radix Isatidis, 0g of Flos Chrysanthemi Indici15g and 0g of Flos Lonicerae10g are used for treating fever and swelling of parotitis, and the curative effect is good. Radix Isatidis 30g, Rhizoma Osmundae 15g, and Radix Glycyrrhizae 3g, decocted in water, daily 1 dose, for 5 days, which can be taken by people who have close contact with mumps to prevent infection.

9, Banlangen acne rash: 50 grams of Banlangen, 65438+ 0.5 grams of licorice (filing, frying). The upper part is fine powder, 2.5g or 5g each time. Take three or two cockscomb blood and add a little warm wine. After eating, use the same tone. (Yan's Second Square Theory)

People with weak constitution but no excess and heat toxicity should avoid taking Radix Isatidis.

Patients with deficiency-cold constitution, frequent colds, chronic gastroenteritis, low blood pressure, listlessness, allergic constitution and blood system diseases, as well as patients with gastroptosis, peptic ulcer, hypothyroidism, arrhythmia and other diseases, should also be treated with caution. Children should avoid large doses and take Radix Isatidis for a long time. Furen Banlangen Granule is antiviral, clearing away heat and toxic materials, and has little side effects. However, if it is used for a long time and eaten in large quantities, it will accumulate "medicine" into diseases and lead to future troubles. Cases of allergic reaction, digestive system and hematopoietic system damage in children caused by clinical use of Banlangen granules are common. When taking drugs for respiratory diseases such as "Radix Isatidis", people with allergic history must be careful not to take them easily. For children, never use adult doses, let alone long-term large doses. If allergic reaction occurs during medication, stop taking the drug immediately and send it to the hospital quickly; In the case of upper gastrointestinal bleeding, in addition to stopping the drug immediately, you should also fast and send it to the hospital as soon as possible. Most colds are caused by virus infection. Although Radix Isatidis has antiviral effect, Chinese medicine divides colds into two types: wind-cold type and wind-heat type. Due to different seasons, people feel different exogenous pathogens, and there are also differences in dampness, heat and dryness. It is unscientific to treat colds with Radix Isatidis, regardless of cold and heat.