Isatis indigotica is the dry root of Isatis indigotica, a cruciferous plant. Isatis indigotica is also called the big leaf of Isatis indigotica. That is, Isatis indigotica and Isatis indigotica are roots and leaves of the same plant Isatis indigotica.
The taste is bitter and cold, and the heart and stomach enter. Has the effects of clearing away heat and toxic materials, cooling blood and relieving sore throat. In ancient times, it was often used for epidemic diseases, sore throat, erysipelas, carbuncle and so on. Life is mainly used for sore throat, dry mouth and throat, acute tonsillitis with the above symptoms caused by lung and stomach heat.
In the treatment of colds, the effect of clearing heat and detoxifying Radix Isatidis is really good. Compound Banlangen Granule can play a good antipyretic role when similar fever and body temperature rise occur.
From SARS, avian influenza to swine flu, Radix Isatidis can be seen everywhere, but it is also used for plague viruses, and plagues are often viral or bacterial infections. Then the question is, can Radix Isatidis resist virus and kill bacteria?
Hou Xianbang, Li Juan, etc. conducted a basic study on the antiviral substances of Radix Isatidis in rats, and separated the components of Radix Isatidis. It was found that 4(3H)- quinazolinone and glycyrrhizin had obvious inhibitory effects on neuraminidase activity of influenza virus. Isatis indigotica can reduce inflammation and tissue damage while playing an antiviral role. In addition, the acidic polysaccharide in Radix Isatidis can also inhibit the activity of neuraminidase of influenza virus.
The research of Chen Zhiwei and others confirmed the anti-inflammatory effect of Radix Isatidis. The decoction extract of Radix Isatidis has antioxidant activities such as SOD activity and scavenging free radicals, which can protect cells from oxidative damage and reduce inflammation.
The decoction extract of Radix Isatidis has obvious inhibitory effect on Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Typhoid Bacillus, Paratyphoid Bacillus, Shigella flexneri, Enterobacteriaceae, etc. At present, Banlangen injection approved for marketing has antibacterial and anti-inflammatory effects on influenza fever and viral pneumonia.
But up to now, the clinical trial data of Radix Isatidis has not been published, and the indications related to antivirus have not been approved. The reason why Radix Isatidis can play an important role in the antiviral process is mainly because of its heat-clearing and detoxicating effects. Often the flu is accompanied by symptoms such as high fever, which just corresponds to the strengths of Radix Isatidis.
The toxicity of Radix Isatidis is very small, and a few people will have mild digestive symptoms when taking conventional doses.
Banlangen is only suitable for treating fever such as wind-heat cold and influenza, but not for other types of cold such as wind-cold cold.
Banlangen is cold, although there are no reports of poisoning, but it can not be used in large quantities for a long time. If people who are physically weak and afraid of cold drink more Banlangen, they may hurt their stomachs due to bitter cold, causing diseases such as indigestion.
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