The four major Huai medicines in Henan refer to four major Chinese medicinal materials, such as Chinese yam, Achyranthes bidentata, Rehmannia glutinosa and chrysanthemum.

Wen county, Qinyang, Wuzhi and Mengzhou, the four major Huai medicines in Henan, are local specialties of Jiaozuo, mainly produced in Guhuai Qingfu.

Study on the efficacy of four Huai drugs in Henan Province

1. Yam is an important tonic, which has the effects of nourishing kidney, invigorating stomach, resolving phlegm, invigorating middle warmer, invigorating qi, expelling wind and dispelling cold, calming the heart and calming the nerves, and promoting granulation and marrow. Yam contains a lot of protein, starch, lysine, choline, saponin, fat and so on. Clinically, it is often used to treat diarrhea, nocturnal emission, amnesia due to kidney deficiency, fatigue and emaciation, neurasthenia, etc. Raw yam is also commonly used for hand and foot chilblain, excessive phlegm and asthma, frequent urination and other diseases. It is one of the commonly used tonics in traditional Chinese medicine prescriptions.

2. Achyranthes bidentata contains a lot of alkaloids, and its functions include nourishing liver and kidney, strengthening bones and muscles, dredging meridians and removing pathogenic blood. Achyranthes bidentata is often used to treat cold and dampness, lumbocrural pain, soreness and weakness of the waist and knees, limb contracture, irregular menstruation, postpartum blood stasis, abdominal pain, bloody stranguria, traumatic injury, knee flexion obstruction, etc. It is one of the commonly used drugs for dredging collaterals and promoting blood circulation in traditional Chinese medicine prescriptions.

3. Rehmannia glutinosa can be divided into Rehmannia glutinosa and Rehmannia glutinosa. Compendium of Materia Medica records: Rehmannia glutinosa is cold, while blood is cool and hot, and it is slightly warm when cooked, but it is necessary for tonifying kidney and failing blood. Men with more yin deficiency should use yellow land; Women with excessive blood heat should use Radix Rehmanniae. Rehmannia glutinosa, in particular, is used as medicine to' replenish bone marrow and grow muscles'. It is a good product to nourish the five internal organs, benefit the eyes and ears, blacken the hair and promote blood circulation.

4. Chrysanthemum has high medicinal value, and Chrysanthemum morifolium belongs to medicinal chrysanthemum. Chrysanthemum is commonly used to improve eyesight, which has the functions of improving eyesight and dispelling summer heat, and can relieve symptoms such as blurred eyes, dizziness and headache.