Chinese Magnoliavine Fruit Classic Formulas

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Restrains Lung Qi and stops chronic cough or wheezing - Wu Wei Zi is classically used when leakage of Lung Qi causes prolonged cough, wheezing, shortness of breath, or weak grasping of breath, especially when Lung and Kidney deficiency coexist.
Generates fluids and checks leakage of sweat and body fluids - the sour, collecting nature helps contain spontaneous sweating, night sweats, thirst, dry mouth, and Qi-Yin depletion after prolonged illness or summer-heat injury.
Binds the intestines and stops chronic deficiency-type diarrhea - it is used when long-standing loose stool, early-morning diarrhea, or intestinal leakage reflects deficiency and cold or combined Spleen-Kidney weakness rather than acute damp-heat infection.
Tonifies the Kidneys and calms the Heart spirit - beyond astringing, Wu Wei Zi nourishes and secures essence while also helping insomnia, palpitations, restlessness, and poor spirit when Heart and Kidney disharmony or Yin depletion are present.

Sheng Mai San (生脉散) - the classic three-herb formula with Ren Shen and Mai Men Dong in which Wu Wei Zi restrains leaking Qi and fluids while the companion herbs tonify and moisten.
Xiao Qing Long Tang (小青龙汤) - Wu Wei Zi plays the crucial 'closing' role in this otherwise strongly dispersing cold-phlegm formula, preventing over-scattering of Lung Qi while cough and wheezing are treated.
Si Shen Wan (四神丸) - paired with Bu Gu Zhi and other warming astringents for early-morning diarrhea and Spleen-Kidney deficiency leakage.
Tian Wang Bu Xin Dan (天王补心丹) - used here for its ability to collect Heart Qi and calm the spirit while deeper Yin and Blood deficiency are replenished.

Me and Qi cites Shen Nong Ben Cao Jing in describing Wu Wei Zi as sour and warm, benefiting Qi, treating cough with counterflow and upward Qi, supplementing insufficiency, strengthening Yin, and benefiting male essence.
The same source emphasizes Wu Wei Zi's classical strategy of 'restraining while nourishing,' which is why it appears in such different settings as chronic cough, diarrhea, sweating, nocturnal emission, and insomnia.
Sacred Lotus and later materia medica sources consistently place Wu Wei Zi among herbs that astringe and stabilize, while classical commentary preserved by Me and Qi notes its relationships with Rou Cong Rong, Wei Rui, and Wu Tou.
Identity notes in modern materia medica stress that superior tonic use belongs to northern Wu Wei Zi from Schisandra chinensis, not the southern species often sold under the same general name.