Transform phlegm
Ban Xia
半夏
Pinellia rhizome
Pinellia ternata
The main phlegm herb. Raw pinellia is toxic. Only prepared herb belongs in a formula.
Not for self-dosing. This page is not a formula, not a strength, and not a substitute for a licensed herbalist or physician.
Category
Warm · Acrid
Meridians entered
Traditional uses
Transforms phlegm, directs rebellious stomach qi downward, and is the nausea herb in dozens of formulas. Preparation (ginger-processed and others) is part of the medicine. Raw herb is caustic.
Common pairings
- Sheng Jiang 生姜
Ginger is both a partner for nausea and part of how the tradition reduces Ban Xia’s harshness.
- Chen Pi 陈皮
The phlegm-and-qi pair of Er Chen Tang: one transforms phlegm, one moves qi so phlegm does not sit.
Cautions
Not for self-dosing. Toxic if raw or poorly prepared. Care in pregnancy. Do not forage it.
Points with a similar aim
Abundant Bulge
Mid-shin luo point taught for phlegm patterns.
Inner Pass
The forearm point people learn for nausea and chest unease.
Middle Cavity
Midway from navel to breastbone, the stomach alarm point.
Celestial Prominence
The throat notch. Learn the landmark. Do not press it.
Use caution