Clam Shell Classic Formulas — Natural Herb Library

Primary Actions

Clears Lung heat, transforms phlegm, and descends Lung Qi - Ge Qiao is used for cough, wheezing, chest fullness, and thick yellow sputum when phlegm-heat or phlegm-fire binds the chest.
Softens hardness and dissipates nodules - the salty shell lineage is classically used for scrofula, goiter-type swelling, and other phlegm-fire accumulations that require a heavy softening medicinal.
Promotes urination and reduces superficial edema - traditional sources give it a milder water-pathway role when lingering phlegm-dampness and edema occur together.
In calcined powder form, restrains acidity and relieves stomach pain - this is a secondary but established shell use for acid regurgitation and epigastric discomfort.

Dai Ge San - Ge Qiao with Qing Dai for phlegm-heat cough, chest pain, and bloody expectoration from Lung heat damaging the collaterals.
Han Hua Wan or related shell-seaweed combinations - Ge Qiao with Hai Zao, Kun Bu, and Wa Leng Zi for goiter and scrofula from phlegm-fire congealing.
Ge Qiao with Hai Piao Xiao and Yan Hu Suo - shell-based antacid and pain-relieving logic for acid regurgitation and epigastric discomfort.

American Dragon describes Ge Qiao/Hai Ge Ke as bitter and salty, cold to neutral, entering the Lung and Stomach, with core actions of clearing Lung heat, transforming phlegm, softening hardness, and promoting urination.
TCM Wiki likewise emphasizes salty-cold entry to the Lung and Stomach and notes that the unprocessed shell is better for clearing heat and resolving phlegm, while the calcined form is better for restraining acidity and astringing.
Traditional shell comparison notes place Ge Qiao close to Wa Leng Zi in antacid use, but relatively more cooling and Lung-directed when phlegm-heat cough is the main issue.