Rhizome of Pedate Pinellia Classic Formulas … Natural Herb Library

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Dries dampness and transforms stubborn phlegm ... Zhang Ye Ban Xia belongs to the toxic Pinellia family and is used for thick phlegm, obstruction, and difficult expectoration patterns.
Dissipates swelling and reduces nodules ... traditional use extends to masses, scrofula-type nodulation, and toxic swellings where a stronger phlegm-resolving underground material was desired.
Redirects rebellious qi and helps stop vomiting ... this follows the broader Ban Xia medicinal tradition, though the raw pedate species is a more specialized and more cautious lane than common processed Ban Xia.

Phlegm-nodule pairings with Zhe Bei Mu, Hai Zao, or Kun Bu ... traditional strategy when swelling and phlegm binding coexist.
Phlegm-obstruction combinations with Chen Pi and Fu Ling ... used when expert sourcing and preparation support internal use.
External swelling applications in the broader Ban Xia and Tian Nan Xing family ... traditional use aimed at reducing hard or toxic accumulations.

Regional and later materia medica describe Zhang Ye Ban Xia as a toxic Pinellia-family herb used for phlegm, swelling, and masses rather than as a gentle tonic.
Because raw Pinellia-family medicinals irritate the throat and mucosa, identity and processing cannot be treated casually.