Datura Flower Classic Formulas — Natural Herb Library

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Relieves cough and dyspnea - Yang Jin Hua is used for difficult cough and wheezing, especially when spasm and obstruction make breathing tight and hard to ease with gentler herbs.
Alleviates pain - it has a strong pain-relieving reputation for chest, abdominal, traumatic, and wind-damp pain and was historically valued for its numbing effect.
Stops spasm - traditional use extends to epilepsy, chronic convulsions, and muscular spasm patterns where a potent antispasmodic herb is required.

Zheng Gu Ma Yao Fang - a classic anesthetic and pain-relieving formula in which Yang Jin Hua is paired with strongly moving herbs for traumatic pain.
Powdered or smoked Yang Jin Hua for stubborn wheezing - traditional minute-dose use when other antitussives have failed to relax the bronchial spasm.
Yang Jin Hua with Tian Ma, Quan Xie, and Tian Nan Xing - a traditional spasm-stopping combination for convulsive disorders.

Traditional texts describe Yang Jin Hua as acrid, warm, and toxic, entering the Lung and Liver to stop wheezing, relieve pain, and arrest spasm.
Its long history as an anesthetic-adjacent herb explains both its dramatic clinical reputation and the strict classical emphasis on tiny dosing.
Older cautions specifically warn against use in pregnancy, weakness, glaucoma, hypertension, tachycardia, and heat-phlegm cough patterns.