Educational information, not medical advice — ask your doctor or midwife.
Track Su Zi Jiang Qi Tang with reminders and record whether it helped, in the app.
Su Zi Jiang Qi Tang is a Chinese herb blend. It is treated as one single drug (TCM formula) made of about nine herbs. Another name for it is Perilla Fruit Decoction for Directing Qi Downward.
People take it for a wet cough with a lot of phlegm. It is also used for wheezing that gets worse when you lie flat. Old texts link it to a tight chest and a full, bloated belly.
What does the proof say? It is a well-known blend in its own tradition, but strong human trials are few. Long use in the past does not prove that a thing works.
The short answer is that no one has proved how it works. Chinese texts say the blend sends qi (the body's breath and drive) back down. In plain words, it is meant to stop air pushing up as cough and wheeze.
Lab and animal work gives a few hints. Perilla seed and magnolia bark can relax airway muscle in test tubes. Ginger and pinellia have long been used to cut phlegm and calm the gut.
These are hints, not proof. No one has shown that the whole blend does these things inside a person.
Most people drink it as a decoction. That means the raw herbs are boiled in water and the liquid is drunk warm.
Granules and powders that you stir into hot water are common too. Pills, honey pills and capsules also exist. These are easier to carry but usually weaker than a fresh decoction.
Buy from a supplier that tests for heavy metals, such as lead. Strength varies a lot between brands.
The blend comes from a Song dynasty book of state herb recipes, the Tai Ping Hui Min He Ji Ju Fang, around 1107 CE. It has been used ever since for cough and wheeze with thick phlegm. It is still taught and used in Chinese medicine today.
Some reactions to Su Zi Jiang Qi Tang need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Call emergency services if you cannot speak a full sentence, your lips or fingertips turn blue, or your chest is tight and painful.
See a doctor soon if your cough lasts more than three weeks, you cough up blood, you lose weight without trying, or you have fever and shaking chills.
Also see a doctor if you notice swollen ankles, a pounding or skipping heartbeat, bad muscle weakness or cramps. These can be signs that the licorice in the blend has pushed your potassium down.
Tell your doctor and pharmacist about every herb you take, especially before any surgery.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Su Zi Jiang Qi Tang is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
One email with the summary. We'll also send a short weekly evidence update — unsubscribe any time.
