Educational information, not medical advice — ask your doctor or midwife.
Trumpet bush is a fast-growing tropical tree, Cecropia peltata. Its large, hand-shaped leaves are dried and brewed as a tea. In the Caribbean that tea is a home remedy for high blood pressure (hypertension) and high blood sugar.
You may know it by other names. It is trumpet tree in Jamaica, bwa twonpèt in Haiti, and yagrumo in Cuba and the Dominican Republic. The hollow stems gave the tree its name.
The honest evidence verdict is simple. Human trials on this plant are few and very small. Lab and animal work hints at effects on blood pressure and blood sugar, which is not the same as proof in people.
Long use in a tradition is not proof that something works. It is also not proof that it is safe. This page says that once, here, and then moves on.
No one has shown how trumpet bush works in the human body. The ideas below come from lab dishes and animals.
In animal studies, leaf extracts lowered blood pressure. Researchers think the leaf may relax blood vessels and act as a mild water pill (diuretic). Human trials have not confirmed this.
In rodents, Cecropia leaf extracts lowered blood sugar after feeding. In test tubes, chlorogenic acid slows an enzyme that breaks starch down into sugar.
Whether a cup of tea does any of that in a person is unknown. Lab doses are often far higher than what a tea gives you.
Leaf extracts also mop up free radicals in test tubes. This is called antioxidant activity. That result on a bench says little about what happens inside you.
So treat every claim about blood pressure, sugar or swelling as a hypothesis. It is a reasonable one. It has not been tested properly in people.
Dried leaf is the usual form. It is brewed as a tea or infusion.
Cut leaf in tea bags is sold in Caribbean markets and online. Loose dried leaf is also common.
Powdered leaf in capsules is sold as a supplement. Strength per capsule is rarely stated in a useful way.
Liquid extracts and tinctures (alcohol extracts) exist. These can be far stronger than a tea, cup for cup.
Bark and root turn up in some folk recipes. Both are studied less than the leaf.
Products are not standardised anywhere. Two brands may differ widely in strength, so a dose that suited one may not suit another.
Trumpet bush has a long record in Caribbean home medicine. Leaf teas were taken for high blood pressure, swelling and sugar problems.
In Jamaica the leaf was brewed for coughs and for the heart. In Haiti and the Dominican Republic it was used in much the same way.
The TRAMIL network surveyed home remedies across the region from the 1980s on. Trumpet bush leaf came up often enough to be reviewed and listed by that programme.
That record shows what people did. It does not show that the remedy worked, and this page does not suggest you treat yourself with it.
Stop using trumpet bush and get medical help straight away if you have any of these:
Fainting, chest pain, or a very low blood pressure reading. Shaking, sweating, confusion or a very low blood sugar reading. Rash, swollen lips or face, or trouble breathing.
Yellowing of your eyes or skin, dark urine, or pain under your right ribs. These can be signs of liver trouble.
See your doctor soon, rather than waiting, if your blood pressure or blood sugar readings change in a way you did not plan. Also see them if a cough, swelling or wound is not settling after a few days.
In the United States, the United Kingdom and the European Union, trumpet bush is not approved as a medicine. It is sold as a herbal tea or food supplement, so it may not be marketed as a treatment for any disease. In parts of the Caribbean it is simply a common home remedy sold in markets.
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.
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