What is An Shen Ding Zhi Wan?

An Shen Ding Zhi Wan is a classical Chinese herbal formula. Practitioners give it to people who feel jumpy, easily startled or anxious at night. It is also used for a racing heartbeat and broken sleep.

Its English name is Settle the Emotions Pill. That name describes the job it was given in traditional practice.

It is sold and prescribed as one finished product. You do not blend the herbs yourself. The usual recipe holds six items:

Ren Shen (ginseng)

Fu Ling and Fu Shen (poria mushroom)

Yuan Zhi (polygala root)

Shi Chang Pu (acorus rhizome)

Long Chi (fossilised animal tooth, a mineral)

Here is the honest verdict on the evidence. This formula has a long, respected history in Chinese medicine. But we could not find good published human trials of the finished formula.

Long use tells you that people have leaned on something for centuries. It does not tell you that the thing works. That holds for everything said below.

How does An Shen Ding Zhi Wan work?

In Chinese medicine, the formula is said to boost the qi (vital energy) of the Heart and Gallbladder. It is also said to calm the shen (the mind or spirit). That is a traditional model of the body, not a account of measured biology.

In lab terms, two ingredients have drawn the most study. Polygala root and acorus rhizome hold compounds that affect nerve signals in animals. Poria holds sugars that had mild calming effects in rodents.

None of that has been shown in people who take this formula. Treat the mechanism as an unproven idea. It is not a settled explanation.

What forms does An Shen Ding Zhi Wan come in?

You will usually meet it in one of these forms:

Pills bound with honey or water. This is the traditional form and the one sold most often.

Strong granules or powder that you stir into hot water.

Capsules or tablets of dried extract.

A raw-herb decoction (a strong tea simmered from loose herbs), made to a practitioner's prescription.

Strength varies a lot between makers. One brand's pill may hold far more herb than another's. Choose a supplier that tests finished batches for heavy metals and shares the results.

Where it comes from:

The formula is credited to Cheng Guopeng's Yi Xue Xin Wu (Medical Revelations). The book came out in China in 1732, during the Qing dynasty. Some sources trace an earlier version to Song dynasty texts.

It was written for a pattern the classics call 'timidity and fright'. That pattern includes palpitations (a heartbeat you can feel) and disturbed sleep.

It has stayed in routine use in Chinese medicine ever since. It also appears in modern Chinese formula textbooks.

What does An Shen Ding Zhi Wan help with?

• Anxiety and a constant feeling of being on edge: This is the formula's main traditional job. It is why most practitioners reach for it. Its standing in tradition here is strong. The human trial evidence is not strong. We could not find a published randomised trial of this formula for anxiety. So there is no way to say if it beats a dummy pill. Does your anxiety hurt your work, your relationships or your sleep most days? Talk to a doctor rather than treating yourself.
• Being easily startled or frightened: Classical texts describe this formula for people who jump at noises. It is also for people who feel afraid with no cause. This is one of its clearest uses in tradition. No human studies have measured startle or fear in people who take it. This use rests on tradition alone.
• Trouble falling asleep, and dreams that wake you: It is used when worry or vivid dreams break your sleep. It is not used when pain or a blocked nose is the cause. Some poria and polygala compounds had mild calming effects in rodents. That is animal work. It does not show that the pills will help you sleep. Good sleep habits have real trial support. So does talking therapy for insomnia (long-term trouble sleeping). This formula does not.
• Palpitations (a heartbeat you can feel thumping or racing): Palpitations that come with fear and tiredness are a classic reason to give this formula in Chinese medicine. There is no human trial evidence for it. Palpitations can also come from thyroid problems, anaemia (low red blood cells) and heart rhythm disorders. Get them checked by a doctor first. Do not assume they are just nerves.
• Poor focus and forgetfulness: Polygala and acorus are both said to 'open the orifices' and sharpen the mind. Both have been studied in animal memory tests. We could not find human trials of this formula for memory or focus. Any claim that it improves thinking is, for now, unproven in people.
• Restlessness in children (used in tradition, and studied very little): Related formulas have been used in China for restless, distractible children. Small Chinese-language studies exist for changed versions. We could not verify a solid trial of this formula in children. The formula holds beta-asarone and a mined mineral. So do not give it to a child on your own. Use it only under a qualified practitioner who knows the product's heavy-metal testing.

Which foods are rich in An Shen Ding Zhi Wan?

This is a compounded herbal formula, not a nutrient, so no food contains it.

What are the side effects of An Shen Ding Zhi Wan?

• Nausea or an upset stomach, most often when taken without food
• Heartburn or stomach burning
• Loose stools
• Vomiting at high doses (polygala root is irritating to the gut)
• Feeling drowsy or slowed down during the day
• Restlessness, jitteriness or trouble sleeping, from the ginseng in some people
• Headache
• Allergic rash or itching
• Raised or lowered blood sugar in people taking diabetes medicines

Good to know:

Most reported problems are digestive and mild, and they usually settle when you take the pills with food or lower the dose. Stomach upset is the single most common complaint.

Two longer-term concerns deserve naming. Acorus rhizome contains beta-asarone, which caused tumours in animal feeding studies, so long unbroken use is not a good idea. Long Chi is a mined fossil mineral that can carry traces of lead unless the manufacturer tests for it.

Because good safety studies in people are missing, unusual or rare harms may simply not have been recorded yet.

How much An Shen Ding Zhi Wan should you take?

• Recommended daily: There is no dose established by clinical research, because the trials that would set one have not been done. What follows is traditional practice, not a proven amount. Traditional pills: roughly 6 to 9 grams a day, split into two or three doses. Follow the label, since pill sizes differ by brand. Concentrated granules: usually 2 to 6 grams a day, again split across the day. Decoction (simmered herb tea): made to an individual prescription by a practitioner. Do not exceed the label amount. More is not better here, and the polygala in it becomes harder on the stomach as the dose rises.
• Best time of day: Usually split across the day, with the last dose in the evening or about an hour before bed when sleep is the main problem.
• With or without food: Take it with or just after food. The polygala root in it can irritate an empty stomach and cause nausea.
• Time to effect: Practitioners usually expect some change in sleep or edginess within one to two weeks. This is a traditional expectation, not a tested one, and it may do nothing at all.
• How long to take it: Traditional use is short courses of two to four weeks, then a review. If nothing has changed after about four weeks, stop and rethink rather than pushing on. Avoid taking it continuously for months on end without a practitioner checking in, mainly because of the beta-asarone and heavy-metal questions around two of the ingredients.