Educational information, not medical advice — ask your doctor or midwife.
Track Zuo Jin Wan with reminders and record whether it helped, in the app.
Zuo Jin Wan is a Chinese herbal pill. Its name in English is Left Metal Pill. People take it for heartburn, sour burping, and burning pain in the upper belly.
It is counted as a single drug (a TCM formula), even though two herbs go into it. Those herbs are Coptis root (Huang Lian) and Evodia fruit (Wu Zhu Yu). The usual mix is six parts Coptis to one part Evodia.
The honest verdict: this pill has a long, steady record in Chinese medicine, but we could not find good human trials of it. Long use is not the same as proof that it works, and that gap is not filled anywhere else on this page.
No one has shown how Zuo Jin Wan works in the human body. In Chinese medicine, Coptis is said to clear "heat" from the stomach and liver. Evodia is said to warm the stomach and stop sour, rising fluid.
Lab and animal work hints at a few actions. Berberine, from Coptis, can cut acid, calm a sore stomach lining, and slow some gut germs. Evodiamine, from Evodia, can change how fast the stomach empties.
Those are dish and animal results. They do not prove the pill does the same thing in you.
Small round pills are the most common form. You may also see capsules, granules you stir into hot water, and loose herbs for boiling at home.
Strength is not the same from maker to maker. Ratios and batch quality vary, so read the label and stick to one brand rather than swapping.
Zuo Jin Wan comes from Danxi Xin Fa, a Chinese text from about 1347. The doctor Zhu Danxi paired the two herbs in a six-to-one mix for sour, burning stomach trouble.
It has stayed in daily use in China ever since. It is listed in the modern Chinese Pharmacopoeia and sold as a ready-made pill.
See a doctor before you start if your stomach pain is new, severe, or wakes you at night. Get medical help the same day if you vomit blood, pass black tarry stools, cannot swallow, or lose weight without trying. Stop the pill and call a doctor if your skin or eyes turn yellow, your urine goes dark, you feel very tired, or you get a rash. If you have diabetes and feel shaky, sweaty or confused, check your blood sugar straight away.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
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.
