Bitter Apricot Seed

Traditional Use

Primary Actions

• Stops cough and calms wheezing by directing rebellious Lung Qi downward - the key classical use for acute or chronic cough, dyspnea, asthma, and phlegm-obstructed Lung patterns across cold, heat, or dryness presentations when paired appropriately.
• Moistens the intestines and unblocks the bowels - the oily kernel is used for constipation from intestinal dryness, especially when Lung dryness and bowel dryness coexist.
• Balances dispersing and descending strategy in Lung formulas - Ku Xing Ren is often combined with releasing herbs, heat-clearing herbs, or moistening herbs depending on whether the cough is from wind-cold, lung heat, or dryness.
• Requires processing to harness benefit safely - the classical therapeutic effect depends on using properly prepared kernels in measured doses rather than raw apricot pits.

Secondary Actions

• Li Dongyuan's classic distinction is that Xing Ren treats the Qi aspect by descending Lung Qi, while Tao Ren treats the Blood aspect by moving Blood.
• The herb appears in numerous foundational cough formulas because it is adaptable across many Lung patterns once the companion herbs are changed.

Classic Formulas

• Ma Huang Tang (麻黄汤) - from Shang Han Lun, where Ku Xing Ren assists Ma Huang in disseminating and descending Lung Qi for wind-cold exterior excess with wheezing.
• Ma Xing Shi Gan Tang (麻杏石甘汤) - from Shang Han Lun, pairing Ku Xing Ren with Ma Huang and Shi Gao for Lung-heat wheezing, cough, and labored breathing.
• Wu Ren Wan (五仁丸) - moistening-constipation formula using Xing Ren alongside other oily seeds to lubricate the intestines and relieve dry stools.

Classical References

• Shen Nong Ben Cao Jing records Xing Ren for cough with rebellious upbearing Qi and highlights its descending action, showing its very early place in Chinese respiratory medicine.
• Ben Cao Gang Mu summarizes Xing Ren as able to scatter and descend, thereby resolving wind, descending Qi, moistening dryness, and dispersing accumulations, while also warning that its toxicity can cause serious reactions if overused.
• Me and Qi preserves Li Dongyuan's influential distinction that Xing Ren treats Qi while Tao Ren treats Blood, a classical teaching still used to differentiate the two kernels in practice.