Educational information, not medical advice — ask your doctor or midwife.
Bois bandé is the bark of Richeria grandis, a rainforest tree of the eastern Caribbean. In Dominica and Trinidad it is called bwa bandé. It is sold as a man's tonic, mainly for sex drive and erections.
The name itself is a problem. Several unrelated trees are sold as bois bandé across the islands. So a bag or bottle with that label may not be Richeria grandis at all.
Human evidence is close to absent. No sound trial in people shows that it helps sex drive or erections. Long use in the islands is not proof that it works, and not proof that it is safe.
No one has shown how bois bandé works in people.
The bark is bitter and holds saponins and tannins. In lab work, saponins from many plants can relax the walls of blood vessels. Whether that happens after a person drinks bark tea is not known.
A few rat studies have looked at bark extracts and mating behaviour. The results were mixed, and the studies were small. Rat findings do not carry over to men.
The old island idea was simpler. Bark steeped in strong rum was thought to warm the body and stir desire. Alcohol and belief may do much of that work.
Bois bandé reaches buyers in a few plain forms.
- Dried bark chips or strips, loose or in bundles.
- Bark steeped in rum, the old island way.
- Capsules and loose bark powder.
- Tinctures, syrups and bottled tonic drinks.
Blends are the hardest to judge. The label often does not say how much bark is inside. Some tonics also carry maca, damiana or other plants.
The rum form brings its own risk. A tonic glass can hold a real amount of alcohol. That matters if you drive, take sedatives, or have liver trouble.
Imported and tourist-market tonics have the worst record. Several have been pulled from sale for holding hidden prescription drugs.
Bois bandé has a long, well-recorded place in Caribbean bush medicine. Healers in Dominica, Trinidad, Grenada and St Lucia used the bark as a man's tonic.
The usual old preparation was bark left to soak in white rum for weeks. The dark drink was taken in small glasses, often at night. Market sellers still offer bark bundles with the same story.
The bark also carried a wider reputation as a strengthener. People took it for tiredness, weak backs and after illness. Colonial-era plant records and later island surveys both note the custom.
This history tells you the plant was valued. It does not tell you what the bark does in the body, and it is not a safety record.
Call emergency services now for chest pain, fainting, a very fast or uneven heartbeat, or trouble breathing.
Go to hospital for an erection that lasts more than four hours. That is a medical emergency and can damage the penis.
Stop and see a doctor for yellow skin or eyes, dark urine, bad headache, rash or swelling of the face.
See a doctor about erection trouble itself. It can be an early sign of heart or blood vessel disease, and it is treatable.
Bois bandé is not approved as a medicine in the United States, the United Kingdom or the European Union. It is sold as a herbal supplement or bush tonic, and several spiked products have been seized or recalled by health regulators.
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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