Educational information, not medical advice — ask your doctor or midwife.
Amburana is the bark and seed of Amburana cearensis, a tree of dry northeast Brazil. In Brazil it is called cumaru-de-cheiro, which means "scented cumaru". It is best known as a home-made cough syrup made from the bark.
The bark and seeds smell strongly of vanilla and fresh-cut hay. That smell comes from coumarin, which the tree makes in large amounts. The same scent is used in perfume and to age cachaça in wood barrels.
Human evidence is very thin. Nearly all the research is in test tubes and animals, not in people. Long use in folk medicine is not proof that it works, and it is not proof that it is safe.
Coumarin is the main reason to be careful. In high doses it has harmed the liver in animals and in some people. That is why this page treats amburana as a caution herb, not an everyday tea.
No one has shown in people how amburana works, or that it works at all.
In animal and tissue studies, bark extracts relaxed the muscle in the airways. Coumarin itself has opened airway tissue taken from guinea pigs. Whether any of this happens in a human chest is unknown.
Two other parts of the bark, amburoside A and isokaempferide, have calmed swelling in rodents. In cell tests they also mop up free radicals, which are unstable particles that can damage cells. These are early lab findings, not proof of benefit.
There is a simpler reason folk syrups may feel helpful. Thick, sweet liquid coats a sore throat and can soothe a dry cough. That effect comes from the syrup, not from the plant.
Coumarin is also the part that raises risk. The liver breaks it down, and in some people that process makes a product that irritates liver cells. This is one of the better understood coumarin effects in humans.
The traditional form is a bark syrup, called lambedor or xarope, usually sweetened with sugar or honey.
Other forms you may meet:
- dried bark chips for a decoction (bark boiled in water) - tinctures, where the bark is soaked in alcohol - capsules of powdered bark - whole seeds sold as a scent or charm, not for eating - blended cough syrups where amburana is one herb among several
Market and home-made syrups are the most common form in Brazil. They carry no dose label and no strength testing. That makes the amount of coumarin you get unpredictable.
Amburana has a long record in the folk medicine of the Brazilian caatinga, the dry scrubland of the northeast. Healers there used bark syrup for coughs, wheeze and chest colds, going back well into the 1800s.
The bark was simmered with sugar or honey and given by the spoonful. Seeds were kept in clothes and drawers for their scent. Some users also put the seed in cachaça, or rubbed bark washes on aching joints.
The tree had non-medical uses too. Its wood was prized for furniture and barrels, and the seed scented tobacco and perfume. Heavy logging has made the species scarce, and it is listed as threatened in Brazil.
This history explains why the plant is trusted locally. It does not tell you whether the syrup helps a cough.
Stop amburana and see a doctor straight away if you notice yellow skin or eyes, dark urine, pale stools, pain under the right ribs, or deep tiredness. These can be signs of liver trouble.
Get urgent help for a rash with swelling of the face, lips or tongue, or for any trouble breathing.
Call emergency services if wheezing gets worse, your lips look blue, or you cannot speak a full sentence. That is an asthma emergency and needs real medicine, not syrup.
See a doctor for any cough that lasts more than three weeks, brings up blood, or comes with fever or weight loss.
In Brazil, amburana is sold freely at open markets and in herbal shops, and bark products fall under Anvisa, the national health agency. In the United States it would be sold as a dietary supplement, which means it is not reviewed for safety or effect before sale. The tree itself is listed as threatened in Brazil, so wild-harvested trade is restricted in places.
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.
