Da Huang Fu Zi Tang
Do not self-treat with Da Huang Fu Zi Tang
Practitioner-prepared only. Where this formula is used at all, it is handled by a trained practitioner who checks the source of every herb and accepts the risk.
If this is an emergency
Some reactions to Da Huang Fu Zi 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.
Who should avoid Da Huang Fu Zi Tang?
- Do not use if you are pregnant, because it can make the womb contract and can harm the baby
- Do not use if you are breastfeeding
- Do not use if you are buying it for a child
- Do not use if you have any heart problem, including a fast, slow or uneven heartbeat
- Do not use if you take digoxin, a water pill (diuretic), or any drug for heart rhythm
- Do not use if you have kidney disease, or have had kidney damage before
- Do not use if you have liver disease
- Do not use if you have sudden severe belly pain, a fever, a swollen hard belly, or a bowel that may be blocked — go to hospital instead
- Do not use if you have loose stools, or a gut disease such as Crohn's disease or ulcerative colitis (long-term swelling in the gut)
- Do not use if you are dehydrated, or if a blood test has shown low potassium (a low level of a body salt)
- Do not use if you are booked for surgery in the next two weeks
- Never buy loose aconite root, and never prepare this formula yourself
- Never take it as a daily or long-term laxative
When should you see a doctor?
Get emergency help now, or call your local emergency number, if you feel numbness or tingling in your lips, tongue, hands or feet. Do the same for a racing, slow or skipping heartbeat, chest pain, heavy sweating, vomiting, blurred sight, weakness or confusion. These can be signs of aconite poisoning, and they can turn serious fast.
See a doctor the same day if you cannot keep fluids down, if you feel faint, or if you pass blood in your stool.
See a doctor soon if your constipation has lasted weeks, if you have lost weight without trying, or if the pain keeps coming back. Those need a proper check, not a stronger herb.
- What it is: A short-course Chinese herbal decoction of rhubarb root, prepared aconite root and asarum root, listed here as a single drug entry.
- Active ingredients: Anthraquinones from rhubarb root, such as emodin and rhein, Aconitine-type alkaloids from prepared aconite root, Volatile oil from asarum root, which may also hold aristolochic acid
- Side effects: Cramps and loose stools are common; aconite can cause numb lips, a bad heartbeat and death.
- Pregnancy & breastfeeding: Avoid in pregnancy and while breastfeeding.
Educational information, not medical advice — ask your doctor or midwife.
What is Da Huang Fu Zi Tang?
Da Huang Fu Zi Tang is a herbal formula from Chinese medicine. It is also known as Rhubarb and Prepared Aconite Decoction. A decoction is a strong tea made by boiling herbs in water.
We list it as a single drug entry, because the herbs are used as one set. It is not a food or a daily tonic. In tradition it is given for a short time, for one set problem.
Healers have used it for belly pain with constipation, when the person also feels cold. Human trial proof is thin, and long use in tradition is not proof that it works.
It holds aconite. Aconite has killed people when it was prepared or dosed wrongly. This is a practitioner-only formula, not a self-care remedy.
How does Da Huang Fu Zi Tang work?
The short answer: no one has shown how this formula works in people.
Rhubarb root holds anthraquinones. These are plant compounds that pull water into the gut and make the bowel move.
Prepared aconite root holds alkaloids, which are strong plant chemicals. In lab work these act on nerve and heart cells. That is also why they can upset the heartbeat.
Xi Xin (asarum root) is used in tradition to warm the body and ease pain. Chinese medicine says the formula warms cold and pushes out what is stuck. That is a traditional idea, not a lab finding.
What forms does Da Huang Fu Zi Tang come in?
The usual form is a decoction. A trained practitioner weighs the raw herbs and boils them, or hands you the herbs with clear boiling steps.
Granules and powders also exist. They are made by boiling the herbs, then drying the liquid.
Ready-made pills of this formula are rare outside China. Never buy loose aconite root and boil it yourself.
Where it comes from:
The formula first appears in the Jin Gui Yao Lue. This is a Chinese medical text from about 200 to 220 CE, linked to the doctor Zhang Zhongjing.
It has stayed in use in Chinese herbal medicine ever since. It belongs to that one tradition. It is not a folk remedy shared across many cultures.
What does Da Huang Fu Zi Tang help with?
- Constipation with belly pain and a cold feeling: This is the classic use. Rhubarb root is a known laxative, so the bowel effect is real and easy to explain. What has not been tested is whether the whole formula beats a plain, safer laxative.
- Long-term belly pain of the traditional cold type: Practitioners pick this formula when pain comes with chills, a pale tongue and cold limbs. This pattern is a traditional way of sorting symptoms. We found no controlled human trial for this use.
- Pain in one side of the belly or the lower belly (traditional use): Old texts describe use for one-sided belly or flank pain. Sudden, severe belly pain can mean a blocked or burst bowel, or appendicitis. That is a hospital problem, not a herb problem.
- Cold hands and feet along with hard, slow stools: Tradition treats this as one picture, not two problems. There is no trial evidence that the formula improves cold hands and feet. Cold limbs can also point to thyroid, heart or blood problems worth checking.
What are the side effects of Da Huang Fu Zi Tang?
- Belly cramps and griping pain
- Loose stools or watery diarrhoea
- Nausea and vomiting
- Red-brown or orange urine, which is harmless and comes from the rhubarb
- Loss of body water, leaving you dry-mouthed and dizzy
- Low potassium (a low level of a body salt), causing weakness and muscle cramps
- Tingling or numbness of the mouth, tongue, hands or feet: an early warning sign of aconite poisoning
- A fast, slow or uneven heartbeat, or a fluttering feeling in the chest
- Sweating, blurred sight or confusion
- Kidney damage, which is a risk if asarum is taken often or for a long time
Good to know:
Cramps and loose stools are common and expected, because rhubarb root works as a laxative.
The aconite effects are rare but serious. Numbness around the mouth, a racing or skipping heartbeat, sweating or confusion can be the start of poisoning. People have died this way.
Treat any of those signs as an emergency. Stop the herbs and get medical help at once.
Options to discuss with a clinician
Several better-studied routes exist for the problems this formula is reached for, and each one belongs in a conversation with a doctor, pharmacist or qualified herbalist rather than being picked off a shelf as a swap.
- **Hard, slow stools.** Bulking and softening approaches worth raising at an appointment include Psyllium Husk, supplemental fiber, Inulin, Partially hydrolyzed guar gum, Resistant Starch (RS2/RS3) and Magnesium. Stimulant options such as Senna (Unani), Rhubarb Root (Persian Rewash) or Cascara sagrada act on the bowel muscle itself, so a clinician's view on whether they suit you, and for how long, matters.
- **Belly pain and cramping.** Peppermint Oil and Probiotics are the most studied here; Massage Therapy, Acupressure and Reflexology are sometimes offered alongside standard care. Ask which, if any, fits your pattern of pain.
- **Cold hands and feet.** This is a signal, not a condition. A doctor can check for thyroid problems, anaemia (low iron in the blood) and circulation issues, and Vitamin D status is often tested at the same time.
- **Long-standing or one-sided belly pain.** Pain that persists, or sits in one area, needs a diagnosis first. Bring it to a GP before any remedy, herbal or otherwise, is considered.
Graded pages for the options named above:
- Partially hydrolyzed guar gum — evidence grade B, traditional tier T0
- Rhubarb Root (Persian Rewash) — evidence grade B, traditional tier T3
- Resistant Starch (RS2/RS3) — evidence grade B, traditional tier T0
- Supplemental fiber — evidence grade A, traditional tier T0
- Cascara sagrada — evidence grade C, traditional tier T2
- Massage Therapy — evidence grade B, traditional tier T3
- Peppermint Oil — evidence grade A, traditional tier T2
- Psyllium Husk — evidence grade A, traditional tier T3
- Senna (Unani) — evidence grade A, traditional tier T3
- Acupressure — evidence grade B, traditional tier T3
- Reflexology — evidence grade C, traditional tier T0
- Probiotics — evidence grade A, traditional tier T0
- Magnesium — evidence grade A, traditional tier T0
- Vitamin D — evidence grade A, traditional tier T0
- Inulin — evidence grade A, traditional tier T0
Review status
This page has not been signed off by a pharmacist and is not published. It is shown here for a policy decision only.