Decoction for treating myasthenia gravis and preparation method thereof

Abstract

The invention discloses a decoction for treating myasthenia gravis and a preparation method thereof. The decoction comprises the following raw materials in parts by weight: 25-35 parts of astragalus membranaceus, 12-18 parts of bighead atractylodes rhizome, 12-18 parts of poria cocos, 12-18 parts of codonopsis pilosula, 10-15 parts of angelica sinensis, 10-15 parts of fructus aurantii, 8-12 parts of pericarpium citri reticulatae, 8-12 parts of pangolin, 5-8 parts of liquorice, 5-8 parts of radix bupleuri, 5-8 parts of ligusticum wallichii, 5-8 parts of ramulus mori, 5-8 parts of salvia miltiorrhiza and 2-5 parts of safflower. The preparation method comprises the following steps: (1) weighing the raw materials; (2) rinsing with clear water and soaking with cold water; (3) pouring into a medicine decocting pot, firstly boiling with big fire, then slowly decocting with small fire, and filtering the decoction while the decoction is hot after decoction; and (4) decocting medicine residues again, and combining decoction solutions to obtain the traditional Chinese medicine. The decoction has the effects of tonifying qi and blood, warming channels and expelling cold, nourishing liver and kidney, strengthening spleen and stomach and the like, realizes relative balance of yin and yang imbalance of a body by adjusting and improving functions of internal organs of a human body, finally achieves the purposes of strengthening tendons and treating flaccid paralysis, and has the characteristics of quick effect, stable curative effect, repeated prevention and the like on myasthenia gravis caused by various reasons.

Description

Technical Field

[0001] The invention relates to the technical field of traditional Chinese medicines, and more particularly to a decoction for treating myasthenia gravis and a preparation method thereof. Background Art

[0002] Myasthenia gravis is a world-wide difficult disease caused by lack of immunity in Western medicine. In traditional Chinese medicine, it is classified as a "paralysis disease". Traditional Chinese medicine treats diseases from the "root" and has a unique effect. "To treat paralysis, only Yangming is taken". Yangming is the stomach, which is the source of qi and blood. Traditional Chinese medicine treats the root and cures for decades without recurrence.

[0003] Therefore, how to develop a decoction for treating myasthenia gravis is a problem that those skilled in the art need to solve urgently. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a decoction for treating myasthenia gravis and a preparation method thereof, so as to solve the deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A decoction for treating myasthenia gravis comprises the following raw materials in parts by weight: 25-35 parts of astragalus, 12-18 parts of atractylodes, 12-18 parts of tuckahoe, 12-18 parts of codonopsis, 10-15 parts of angelica, 10-15 parts of fructus aurantii, 8-12 parts of tangerine peel, 8-12 parts of pangolin, 5-8 parts of liquorice, 5-8 parts of bupleurum, 5-8 parts of ligusticum, 5-8 parts of mulberry branches, 5-8 parts of salvia miltiorrhiza and 2-5 parts of safflower.

[0007] Furthermore, the above-mentioned decoction for treating myasthenia gravis includes the following raw materials in parts by weight: 35 parts of astragalus, 18 parts of atractylodes, 18 parts of poria, 18 parts of codonopsis, 15 parts of angelica, 15 parts of fructus aurantii, 12 parts of tangerine peel, 12 parts of pangolin, 8 parts of licorice, 8 parts of bupleurum, 8 parts of ligusticum, 8 parts of mulberry branches, 8 parts of salvia miltiorrhiza and 5 parts of safflower.

[0008] Furthermore, the above-mentioned decoction for treating myasthenia gravis includes the following raw materials in parts by weight: 30 parts of astragalus, 15 parts of atractylodes, 15 parts of poria, 15 parts of codonopsis, 12 parts of angelica, 12 parts of fructus aurantii, 10 parts of tangerine peel, 10 parts of pangolin, 6 parts of licorice, 6 parts of bupleurum, 6 parts of ligusticum, 6 parts of mulberry twig, 6 parts of salvia miltiorrhiza and 3 parts of safflower.

[0009] Furthermore, the above-mentioned decoction for treating myasthenia gravis includes the following raw materials in parts by weight: 25 parts of astragalus, 12 parts of atractylodes, 12 parts of poria, 12 parts of codonopsis, 10 parts of angelica, 10 parts of fructus aurantii, 8 parts of tangerine peel, 8 parts of pangolin, 5 parts of licorice, 5 parts of bupleurum, 5 parts of ligusticum, 5 parts of mulberry twig, 5 parts of salvia miltiorrhiza and 2 parts of safflower.

[0010] In the present invention, astragalus and codonopsis are used as the main drugs, which play the role of invigorating qi and raising yang, strengthening the body's defense and strengthening the exterior. Atractylodes macrocephala, Poria cocos and Angelica sinensis are used as the ministerial drugs, which play the role of invigorating qi and blood. Fructus aurantii, dried orange peel, pangolin, bupleurum, ligusticum chuanxiong, salvia miltiorrhiza and safflower are used as adjuvant drugs to assist the main and ministerial drugs to strengthen the spleen-tonifying effect, improve blood circulation and promote muscle recovery. Licorice and mulberry branches are used as the guiding drugs, which play the role of harmonizing the various drugs, guiding the various drugs to directly reach the diseased area, and making the prescription more peaceful.

[0011] Among them, Huangqi, a Chinese medicine name, is the root of Astragalus memeranaceus (Fisch.) Bge. Var. mongholicus (Bge.) Hsiao or A. membranaceus (Fisch.) Bge. of the genus Astragalus in the Leguminosae family. It has the effects of strengthening the spleen and replenishing the middle, raising yang and lifting the sunken, benefiting the body's defense and strengthening the exterior, promoting urination, and expelling toxins and promoting muscle growth. It is mainly used to treat spleen qi deficiency syndrome, lung qi deficiency syndrome, qi deficiency and spontaneous sweating syndrome, qi and blood deficiency, sores that are difficult to heal or ulcers that are difficult to heal for a long time, etc.

[0012] Baizhu, a Chinese medicine name. It is the dried rhizome of the Asteraceae plant. It enters the spleen and stomach meridians, tastes bitter, sweet and is warm in nature. It has the functions of strengthening the spleen and replenishing qi, drying dampness and promoting diuresis, stopping sweating and calming the fetus.

[0013] Poria cocos, a Chinese medicine, is the dried sclerotium of the Polyporaceae fungus Poria cocos (Schw.) Wolf. It tastes sweet and light, and is neutral in nature. It enters the heart, lung, spleen, and kidney meridians. It promotes diuresis and eliminates dampness, strengthens the spleen, and calms the mind. It is used for edema, oliguria, phlegm and fluid, palpitations, spleen deficiency, poor appetite, loose stools, diarrhea, restlessness, palpitations, and insomnia.

[0014] Codonopsis, a Chinese medicine. It is a herbal medicine included in the "Chinese Pharmacopoeia". The source of the herbal medicine is the dried roots of Codonopsis, Codonopsis pilosula or Codonopsis pilosula of the Campanulaceae family. Codonopsis pilosula is sweet and flat in nature. It can nourish the middle and replenish qi, quench thirst, strengthen the spleen and benefit the lungs, nourish blood and produce body fluid. It is used for spleen and lung qi deficiency, fatigue due to poor appetite, cough and asthma, insufficient qi and blood, sallow complexion, palpitations and shortness of breath, thirst due to loss of body fluid, internal heat and thirst. It is used for lazy speech, shortness of breath, weakness in the limbs, poor appetite, qi deficiency, deficiency of both qi and body fluid, deficiency of both qi and blood, and sallow complexion due to blood deficiency. However, it cannot be used for those with unresolved superficial symptoms and fullness of the middle evil. The efficacy of this product is similar to that of ginseng, but the medicinal power is weak. It can be used instead of ginseng to treat general deficiency syndrome; for severe prostration, it is still appropriate to use ginseng. Dig it up in autumn, wash it, and dry it in the sun.

[0015] Angelica sinensis, a Chinese medicine name. It is the dried root of Angelica sinensis (Oliv.) Diels, a plant of the Umbelliferae family. It is mainly produced in southeastern Gansu, with Minxian producing the most and having good quality, followed by Yunnan, Sichuan, Shaanxi, Hubei and other provinces, all of which are cultivated. It has the effects of nourishing blood and activating blood circulation, regulating menstruation and relieving pain, and moistening the intestines and relieving constipation. It is often used for blood deficiency and chlorosis, dizziness and palpitations, irregular menstruation, amenorrhea and dysmenorrhea, abdominal pain due to deficiency and cold, rheumatic arthralgia, traumatic injuries, carbuncle sores, and constipation due to dry intestines.

[0016] Zhiqiao, a Chinese medicine, is the dried immature fruit of Citrus aurantium L. and its cultivars. It is harvested in July when the peel is still green, cut into two halves from the middle, and dried in the sun or at low temperature. It has the effects of regulating qi, relieving fullness, and relieving stagnation and swelling. It is often used for qi stagnation in the chest and flanks, fullness and pain, indigestion, phlegm and fluid retention, and sagging organs.

[0017] Chenpi, a Chinese medicine, is the dried mature peel of the Rutaceae plant Citrus reticulata Blanco and its cultivated varieties. The medicinal material is divided into "Chenpi" and "Guang Chenpi". Pick the ripe fruits, peel the peel, and dry them in the sun or at low temperature. It tastes bitter and pungent, and is warm in nature. It enters the lung and spleen meridians. It regulates qi and strengthens the spleen, dries dampness and resolves phlegm. It is used for abdominal distension, loss of appetite, vomiting and diarrhea, and cough with a lot of phlegm.

[0018] Pangolin is a Chinese medicine. It is also called Paojiazhu and Paoshanjia. It is usually made from the scales of the dace (pangolin, conservation level: Critically Endangered (CR) IUCN standard). It can reduce swelling, ulcer, remove wind and activate collaterals, and promote menstruation and lactation. It can treat carbuncle, swelling, wind-cold and dampness, amenorrhea, lactation and blood in stool.

[0019] Licorice, a Chinese medicine name. It is the dried root and rhizome of Glycyrrhiza uralensis Fisch., Glycyrrhiza inflata Bat. or Glycyrrhiza glabra L. of the Leguminosae family. It is distributed in Northeast China, North China, Shaanxi, Gansu, Qinghai, Xinjiang, Shandong and other places. It has the effects of tonifying the spleen and replenishing qi, clearing away heat and detoxifying, removing phlegm and relieving cough, relieving pain and harmonizing various medicines. It is often used for spleen and stomach weakness, fatigue, palpitations and shortness of breath, cough with sputum, acute pain in the abdomen and limbs, carbuncle, sore and ulcer, and relieves the toxicity and potency of drugs.

[0020] Bupleurum, a Chinese herbal medicine. It is a herbal medicine included in the Chinese Pharmacopoeia. The medicinal part is the dried root of the Umbelliferae plant Bupleurum or Angustifolia. It is dug in spring and autumn, the stems, leaves and mud are removed, and dried. Bupleurum is a commonly used antipyretic. It is also known as ground smoke, mountain vegetable, mushroom grass, and firewood. It is bitter and slightly cold in nature and enters the liver and gallbladder meridians. It has the effects of reconciling the exterior and interior, soothing the liver and raising yang. It is used for colds and fever, alternating colds and heat, malaria, liver depression and qi stagnation, chest and rib pain, rectal prolapse, uterine prolapse, and irregular menstruation.

[0021] Chuanxiong is a Chinese medicine. It was first recorded in Tangye Bencao. It is recorded in Benjing, Tangye Bencao and Pharmacopoeia that Chuanxiong can be used to promote blood circulation and qi, dispel wind and relieve pain. It has certain effects on headache, irregular menstruation, promoting blood circulation and promoting qi. It tastes spicy and warm. It enters the liver and gallbladder meridians. It promotes qi and relieves depression, dispels wind and dampness, promotes blood circulation and relieves pain. It treats headache and dizziness caused by wind and cold, flank pain and abdominal pain, cold arthralgia and muscle spasm, amenorrhea, dystocia, postpartum blood stasis and pain, carbuncle and ulcer. It is used for irregular menstruation, amenorrhea and dysmenorrhea, abdominal pain caused by masses, stabbing pain in the chest and flanks, swelling and pain caused by falls, headache, and rheumatic pain.

[0022] Mulberry branch, a Chinese medicine name. It is the dried young branches of Morus alba L., a plant of the Moraceae family. It is harvested in late spring and early summer, with leaves removed and sun-dried, or sliced ​​while fresh and sun-dried. It tastes slightly bitter and is neutral in nature. It is used for the liver meridian. It has the effect of removing rheumatism and benefiting joints. It is used for rheumatic arthritis, pain and numbness in the shoulders, arms and joints.

[0023] Danshen, a Chinese medicine, is the dried root and rhizome of Salvia miltiorrhiza Bge., a plant of the Lamiaceae family. It is dug in spring and autumn, removed from the mud and sand, and dried. It is distributed in most parts of the country. It has the effects of promoting blood circulation and removing blood stasis, relieving pain from menstruation, clearing the heart and eliminating vexation, cooling blood and eliminating carbuncle. It is used for chest pain, abdominal pain, accumulation of lumps, pain caused by heat arthralgia, restlessness and insomnia, irregular menstruation, dysmenorrhea and amenorrhea, and sores and swelling.

[0024] Safflower, a Chinese medicine name. It is the dried flower of Carthamus tinctorius L., a plant of the Asteraceae family. The flowers are picked in summer when they turn from yellow to red, and dried in the shade or in the sun. It is widely cultivated throughout the country. It has the effects of promoting blood circulation and menstruation, dispersing blood stasis and relieving pain. It is used for amenorrhea, dysmenorrhea, lochia retention, lumps and masses, chest pain, abdominal pain due to blood stasis, stabbing pain in the chest and ribs, injuries from falls, and swelling and pain in sores.

[0025] A method for preparing a decoction for treating myasthenia gravis specifically comprises the following steps:

[0026] (1) Weighing the raw materials according to the weight proportions of the above-mentioned decoction for treating myasthenia gravis;

[0027] (2) First rinse each raw material with clean water to remove dust and impurities on the surface, then put it into a container and soak it in cold water;

[0028] (3) Pour the soaked ingredients and water into a decoction pot, first boil over high heat, then simmer over low heat, and filter the decoction while it is still hot;

[0029] (4) The residue is boiled again and the decoction is combined to obtain a decoction for treating myasthenia gravis.

[0030] Furthermore, in the above step (2), the soaking time is 30-60 minutes.

[0031] Furthermore, in the above step (3), the time for slow simmering over low heat is 40-60 minutes.

[0032] Furthermore, in the above step (4), the number of times of re-decoction is 2-3 times.

[0033] It can be seen from the above technical solution that compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] The decoction of the present invention has the effects of invigorating qi and blood, warming the meridians and dispelling cold, nourishing the liver and kidneys, strengthening the spleen and stomach, etc. It adjusts and improves the functions of human organs, so that the imbalance of yin and yang in the body reaches a relative balance, and finally achieves the purpose of strengthening tendons and curing impotence. It has the characteristics of rapid effect, stable therapeutic effect, and prevention of recurrence in the treatment of myasthenia gravis caused by various reasons. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] A decoction for treating myasthenia gravis, comprising the following raw materials by weight: 35g of Astragalus, 18g of Atractylodes macrocephala, 18g of Poria, 18g of Codonopsis pilosula, 15g of Angelica sinensis, 15g of Citrus aurantium, 12g of Tangerine peel, 12g of Squama pangolin, 8g of Licorice, 8g of Bupleurum, 8g of Chuanxiong, 8g of Morus alba, 8g of Salvia miltiorrhiza, and 5g of Carthamus tinctorius;

[0038] The preparation method of the above-mentioned decoction for treating myasthenia gravis specifically comprises the following steps:

[0039] (1) Weighing the raw materials according to the weight proportions of the above-mentioned decoction for treating myasthenia gravis;

[0040] (2) First rinse each raw material with clean water to remove dust and impurities on the surface, then put it into a container and soak it in cold water for 30 minutes;

[0041] (3) Pour the soaked ingredients and water into a decoction pot, boil over high heat, then simmer over low heat for 60 minutes, and filter the decoction while it is still hot;

[0042] (4) The residue is boiled twice more and the decoction is combined to obtain a decoction for treating myasthenia gravis.

[0043] Example 2

[0044] A decoction for treating myasthenia gravis, comprising the following raw materials by weight: 30g of Astragalus, 15g of Atractylodes macrocephala, 15g of Poria, 15g of Codonopsis pilosula, 12g of Angelica sinensis, 12g of Citrus aurantium, 10g of Tangerine peel, 10g of Squama pangolin, 6g of Licorice, 6g of Bupleurum, 6g of Chuanxiong, 6g of Morus alba, 6g of Salvia miltiorrhiza, and 3g of Carthamus tinctorius;

[0045] The preparation method of the above-mentioned decoction for treating myasthenia gravis specifically comprises the following steps:

[0046] (1) Weighing the raw materials according to the weight proportions of the above-mentioned decoction for treating myasthenia gravis;

[0047] (2) First rinse each raw material with clean water to remove dust and impurities on the surface, then put it into a container and soak it in cold water for 45 minutes;

[0048] (3) Pour the soaked ingredients and water into a decoction pot, boil over high heat, then simmer over low heat for 50 minutes, and filter the decoction while it is still hot;

[0049] (4) The residue is boiled again three times and the decoction is combined to obtain a decoction for treating myasthenia gravis.

[0050] Example 3

[0051] A decoction for treating myasthenia gravis, comprising the following raw materials by weight: 25g of Astragalus, 12g of Atractylodes macrocephala, 12g of Poria, 12g of Codonopsis pilosula, 10g of Angelica sinensis, 10g of Citrus aurantium, 8g of Tangerine peel, 8g of Squama pangolin, 5g of Licorice, 5g of Bupleurum, 5g of Chuanxiong, 5g of Morus alba, 5g of Salvia miltiorrhiza, and 2g of Carthamus tinctorius;

[0052] The preparation method of the above-mentioned decoction for treating myasthenia gravis specifically comprises the following steps:

[0053] (1) Weighing the raw materials according to the weight proportions of the above-mentioned decoction for treating myasthenia gravis;

[0054] (2) First rinse each raw material with clean water to remove dust and impurities on the surface, then put it into a container and soak it in cold water for 60 minutes;

[0055] (3) Pour the soaked ingredients and water into a decoction pot, boil over high heat, then simmer over low heat for 40 minutes, and filter the decoction while it is still hot;

[0056] (4) The residue is boiled again three times and the decoction is combined to obtain a decoction for treating myasthenia gravis.

[0057] Performance Testing

[0058] 1. Effect test

[0059] Thirty myasthenia gravis patients with mild to moderate ptosis, limited extraocular muscle activity, and varying degrees of weakness in the mandibular muscles, facial muscles, upper limb muscles, respiratory muscles, and trunk muscles were selected and divided into three groups, with 10 people in each group, and the decoctions prepared in Examples 1-3 of the present invention were used respectively.

[0060] After 1 month, the symptoms of each patient were observed, the number of ineffective patients, effective patients and markedly effective patients in each group were counted, and the effective rate of each group was calculated. The results are shown in Table 1.

[0061] Among them, ineffective: myasthenia gravis symptoms basically did not disappear;

[0062] Onset of effect: Myasthenia gravis basically disappears;

[0063] Marked effect: Myasthenia gravis symptoms completely disappeared;

[0064] Effective rate = (number of effective patients + number of markedly effective patients) / total number of patients × 100%.

[0065] Table 2 Test results of Example 1-3 decoction for the treatment of myasthenia gravis

[0066] Decoction Total number of people Invalid number of people Number of people who took effect Number of people with significant effect Effectiveness / % Example 1 10 1 2 7 90 Example 2 10 0 1 9 100 Example 3 10 1 1 8 90

[0067] As shown in Table 2, the decoctions prepared in Examples 1-3 of the present invention have an effective rate of more than 90% in treating myasthenia gravis, wherein Example 2 is the best example, with an effective rate of 100%.

[0068] The above experiments show that the decoction of the present invention has the effects of invigorating qi and blood, warming the meridians and dispelling cold, nourishing the liver and kidneys, strengthening the spleen and stomach, etc. It can adjust and improve the functions of human internal organs, so that the imbalance of yin and yang in the body can reach a relative balance, and finally achieve the purpose of strengthening tendons and curing impotence. It has the characteristics of rapid effect, stable efficacy, and prevention of recurrence in the treatment of myasthenia gravis caused by various reasons.

[0069] 2. Typical Cases

[0070] Bai Hui. Female, 25 years old. Diagnosed with myasthenia gravis in Shijiazhuang Second Provincial Hospital in 2020.

[0071] After 5 years of treatment with Western medicine, kidney damage occurred. Western medicine has no specific treatment. The patient came to a Chinese medicine doctor for treatment. Initial visit. The patient was pale, short of breath and lazy to speak. He said that he often fell, had difficulty climbing stairs, could not hold things, was dizzy, tired and weak, had a poor diet, and was constipated. The tongue was dull with teeth marks, the tongue coating was white, and the pulse was thin and weak. The syndrome is spleen and stomach qi deficiency, qi and blood deficiency, qi stagnation and blood stasis syndrome. The treatment principle is to replenish qi and blood, and to activate blood circulation and remove blood stasis. Myasthenia gravis soup. The patient's family asked when it would take effect, and the answer was that it would take effect in one month. Because the immunity is extremely damaged, it is necessary to drink the soup for 3 years. Western medicine explained that it is immune deficiency and genes. The doctor's advice is to avoid. Avoid acupuncture and moxibustion to damage qi, and avoid eating white radish, alcohol, and mung beans. Eat more carrots and avoid excessive exercise to damage qi.

[0072] After one month of treatment with myasthenia gravis decoction, the effect was very obvious. The patient did not fall down once within a month, and was able to hold things to work. Shortness of breath and fatigue were significantly reduced, dizziness was relieved, pulse was thin and weak, and symptoms were significantly improved. In the second month of taking the medicine, the patient fell down several times again. When asked about the situation, it was due to a cold, which caused a decrease in immunity. In the third month of treatment, the patient's menstruation came early, and the doctor ordered to continue. In the fourth month, the menstruation was normal. After the treatment, the patient's complexion was ruddy, fatigue and weakness were relieved, and the diet was normal. Later in winter, due to insufficient yang energy, he fell down again. Later, the heating was turned on, the yang energy was restored, and there were no more falls. The doctor ordered to continue taking the medicine for 3 years.

[0073] Note: Myasthenia gravis is a world problem. Western medicine neostigmine can only relieve the symptoms, and blood protein transfusion can only treat the symptoms but not the root cause. Chinese medicine treats the root cause and has no side effects. It regulates qi and blood, balances yin and yang, and dredges the meridians. The ancient saying "treat the disease by taking Yangming alone" means replenishing qi and blood from the spleen and stomach, activating the meridians, dredging the meridians, and the disease will be cured. Because the disease is in the collaterals, it is also deep, so it takes 3 years of conditioning to restore Yangming. The disease will be cured naturally if the dialectics are correct.

[0074] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A decoction for treating myasthenia gravis, characterized in that: The invention comprises the following raw materials in parts by weight: 25-35 parts of astragalus, 12-18 parts of atractylodes, 12-18 parts of poria, 12-18 parts of codonopsis, 12-18 parts of angelica, 10-15 parts of fructus aurantii, 8-12 parts of tangerine peel, 8-12 parts of pangolin, 5-8 parts of licorice, 5-8 parts of bupleurum, 5-8 parts of ligusticum, 5-8 parts of mulberry branch, 5-8 parts of salvia miltiorrhiza and 2-5 parts of safflower.

2. A decoction for treating myasthenia gravis according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 35 parts of astragalus, 18 parts of atractylodes, 18 parts of tuckahoe, 18 parts of codonopsis, 15 parts of angelica, 15 parts of fructus aurantii, 12 parts of tangerine peel, 12 parts of pangolin, 8 parts of liquorice, 8 parts of bupleurum, 8 parts of ligusticum, 8 parts of mulberry branches, 8 parts of salvia miltiorrhiza and 5 parts of safflower.

3. A decoction for treating myasthenia gravis according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 30 parts of astragalus, 15 parts of atractylodes, 15 parts of poria, 15 parts of codonopsis, 12 parts of angelica, 12 parts of fructus aurantii, 10 parts of tangerine peel, 10 parts of pangolin, 6 parts of liquorice, 6 parts of bupleurum, 6 parts of ligusticum, 6 parts of mulberry branches, 6 parts of salvia miltiorrhiza and 3 parts of safflower.

4. A decoction for treating myasthenia gravis according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 25 parts of astragalus, 12 parts of atractylodes, 12 parts of poria, 12 parts of codonopsis, 10 parts of angelica, 10 parts of fructus aurantii, 8 parts of tangerine peel, 8 parts of pangolin, 5 parts of liquorice, 5 parts of bupleurum, 5 parts of ligusticum, 5 parts of mulberry branches, 5 parts of salvia miltiorrhiza and 2 parts of safflower.

5. A method for preparing a decoction for treating myasthenia gravis, characterized in that: The specific steps include: (1) Weighing the raw materials according to the weight proportions of the decoction for treating myasthenia gravis according to any one of claims 1 to 4; (2) First rinse each raw material with clean water to remove dust and impurities on the surface, then put it into a container and soak it in cold water; (3) Pour the soaked ingredients and water into a decoction pot, first boil over high heat, then simmer over low heat, and filter the decoction while it is still hot; (4) The medicinal residue is decocted again, and the decoction is combined to obtain the decoction for treating myasthenia gravis.

6. The method for preparing a decoction for treating myasthenia gravis according to claim 5, characterized in that: In step (2), the soaking time is 30-60 minutes.

7. The method for preparing a decoction for treating myasthenia gravis according to claim 5, characterized in that: In step (3), the slow simmering time over low heat is 40-60 minutes.

8. The method for preparing a decoction for treating myasthenia gravis according to claim 5, characterized in that: In step (4), the re-decoction is performed 2-3 times.