Indications: It is used for patients with fever caused by pathogenic factors, mild aversion to cold, headache, swelling and swelling of throat, dry mouth and thirst, red tongue, thin and white fur and floating pulse. Taste: pungent, bitter and cold. Enter the lung meridian. Usage and dosage: for oral administration: decoct soup 3- 10g, or grind it into powder and take it with boiling water. Various discussions: "Xinhua compendium of materia medica": rhizome: it has the effect of clearing away heat and detoxifying. Used to prevent influenza. Adverse reactions: large doses will affect vision and may cause irreversible blindness. Use with caution. Nickname: Guanzhong (Anyue, Sichuan) Latin scientific name: Dryopteris Dryopteris.
1. Insecticidal effect: Osmunda crassipes, namely Osmunda japonica, whose root name is Mianma, contains 49. 17% filicin, which can be used as a substitute for Dryopteris Dryopteris to repel tapeworms. European cotton horse can paralyze tapeworms, which has been used for a long time. It has been reported in China that Rhizoma Osmundae (unknown species) is effective against SINONOVACULA constricta in vitro. Dryopteris crassipes can also drive away leeches from cattle liver. Its polyjuice potion has therapeutic effect on Fasciola bovis and Fasciola gigantea.
2. Antiviral effect: It has been reported in Shanghai that Rhizoma Osmundae has a strong inhibitory effect on influenza virus (influenza A PR8 strain and Asian virus A) in chicken embryo test, and it is also effective on mice (nose drop test), but the effect is weak. This antiviral effect is related to tannic acid (containing 14.5%). It has also been reported in Shaanxi that Guanzhong has inhibitory effects on influenza A (PR8), Asian influenza A (57-4), influenza B (Lee), influenza C (1233) and influenza D (Sendai). In the tissue culture of primary monolayer cells of human embryonic kidney, it is also proved that Guanzhong has strong antiviral effect on seven representative virus strains, such as adenovirus type 3 No.479, poliomyelitis type 2 No.72, echo type 9 No.44, coxsackie A9, coxsackie B5, Japanese encephalitis (Jingweiyan 1 strain) and herpes simplex 140 strain. Ou Mianma decoction also has anti-herpes simplex virus effect. Dryopteris bicolor (Figure 6)
3. Antibacterial effect: Jiangxi, Hunan and Guangdong reported that the local Rhizoma Osmundae had certain antibacterial effect, but the effect was not strong, and it was used for disinfection of drinking water or prevention of epidemic cerebrospinal meningitis in rural areas. It is said that it also has a certain inhibitory effect on skin fungi.
4. Effect on uterus: The decoction and its refined effective components have obvious exciting effect on rabbit uterus in vitro and in vivo, and the contraction and tension are enhanced. Dryopteris crassirhizoma injection can significantly stimulate the isolated uterus of guinea pigs (0. 1-0.7ml, each ml is equivalent to 50 mg of crude drug) and rabbits (0.8- 1.3ml), and the exercise frequency and tension increase, but the amplitude decreases, resulting in high-dose rigidity and contraction. But it can still return to normal after washing. The effect of Dryopteris crassipes on uterus is not obvious.