Pinellia (Pinellia ternata) is a traditional Chinese herb people take to settle nausea, calm a queasy stomach, and help clear a cough with thick phlegm. It also eases digestive upset.
Raw pinellia is toxic. It can badly irritate your mouth, throat, and gut. You must process it before use, usually by boiling it with ginger or similar ingredients to make it safe. It comes as a decoction or powdered extract.
Because the herb is potent and toxic in its raw form, only take it under the care of a qualified healthcare professional. Avoid it while pregnant. It may interact with medications.