Study on Zhang Zhongjing's Skillful Use of Mahuang in Treating Cough
Mahuang(Herba Ephedrae)can induce sweating to release the exterior,ventilate the lung to alleviate wheezing,and promote urination to reduce swelling.Its primary function is to ventilate and dredge,and it can reach both exterior and interior.When used with appropriate combinations and dosages,its"dredging"characteristic can effectively treat cough.Ephedra Decoction is used for externally contracted wind-cold with obstructed muscle layer and lung qi failing in dispersion.Minor Green Dragon Decoction is used for treating cold-damp accumulation in the lung.Major Green Dragon Decoction is used for syndrome of cold pathogens obstructing the muscle layer and transforming into heat.Belamcanda and Ephedra Decoction is a classic formula for treating cold asthma.Minor Green Dragon Decoc-tion combined with Gypsum Decoction is used for externally contracted wind-cold with internal stagnant heat.Officinal Magnolia Bark and Ephedrae Decoction is used for exterior pathogens inducing internal phlegm with heat pressing on the lung.Ephedra and Apricot Kernel and Gypsum and Licorice Decoction is used for exterior pathogens transforming into heat,with heat and pathogens penetrating in-to the lung,causing lung qi stagnation or reversal.Maidservant From Yue Decoction plus Banxia(Rhizoma Pinelliae)is used for phlegm-heat accumulation and lung qi obstruction causing upper respiratory symptoms.Ephedra and Aconite and Asarum Decoction is used for greater yang exterior syndrome complicated with lesser yin yang deficiency.Cinnamon Twig Decoction plus Gegen(Radix Puer-ariae Lobatae)is suitable for individuals with physical deficiency,exterior pathogens affecting the greater yang,and imbalance of de-fense qi and nutrient qi,resulting in qi stagnation and loss of nourishment to the muscles.Regardless of whether the cough is caused by cold,heat,exterior,or interior conditions,Mahuang can be used,but caution is needed when treating heat syndrome by adjusting the dos-age and often combining it with Shigao(Gypsum Fibrosum)to moderate its warm and pungent properties.When using Mahuang for exte-rior deficiency,the dosage should be more careful,and a slight sweating of the patient is sufficient.
coughMahuang(Herba Ephedrae)Treatise on Cold Damage DiseasesSynopsis of the Golden ChamberZhang Zhongjing