Educational information, not medical advice — ask your doctor or midwife.
Wild basil is a leafy, strong-smelling shrub, Ocimum gratissimum. In the Caribbean it is a common bush tea plant. Jamaicans often call it fever bush.
In Haiti it is known as basilic grand. In the Dominican Republic it is albahaca de clavo, or clove basil. The name points to its clove-like scent.
People drink the leaf tea for fever, colds and an upset stomach. The honest verdict is that human evidence is thin. Long use in tradition is not proof that it works, nor proof that it is safe.
Almost everything known about how it acts comes from the lab, not from people.
The leaf oil is rich in eugenol and thymol. In test tubes, these slow the growth of some bacteria and fungi. Whether that happens inside your body is not established.
In animal studies, leaf extracts have lowered fever and eased pain. The amounts used were often far above a cup of tea. Animal results do not prove the same effect in you.
Cell studies suggest the oil may damp down some markers of inflammation. That is a laboratory finding only.
A hot drink also loosens mucus and soothes a sore throat. That part is simple warmth and fluid. It is not special to this plant.
Fresh leaf tea is the usual Caribbean form. Dried leaf and leafy sprigs are sold in markets and herb shops.
Common forms:
- Fresh or dried leaf for tea - Leafy bundles for a bush bath - Dried leaf in capsules
Stronger or processed forms:
- Steam-distilled essential oil - Tinctures and liquid extracts - Leaf used as a cooking herb
The essential oil is by far the strongest form. It is meant for scent, not for swallowing. One drop holds the oil of a large pile of leaves.
Strength also varies between batches. Two packets of dried leaf can differ a lot. There is no standard product you can rely on.
Caribbean bush medicine has used wild basil for generations. The Jamaican name fever bush records its main role: a hot tea for fever and chills.
Haitian healers used basilic grand for colds, coughs and belly pain. In the Dominican Republic, albahaca de clavo was brewed for the same complaints.
The leaves were also boiled for washes, steam baths and sick-room cleaning. Bundles were rubbed on the skin to keep insects off.
The plant likely travelled with people from West Africa, where it has a parallel history. It settled into island yards and kitchens as both food and medicine.
Stop using it and see a doctor if you feel unwell after taking it.
Seek care the same day if you notice:
- Yellow skin or eyes (jaundice) - Dark urine or pain under your right ribs
Also get checked for:
- Easy bruising, or bleeding that will not stop - A rash, swelling of the face, or trouble breathing
A fever is a reason to get care, not to brew stronger tea. Get help if a fever lasts more than three days. Call emergency services if a child is limp, burning hot, or hard to wake.
In the United States and the United Kingdom, wild basil is sold as a food herb or a supplement, not as a licensed medicine. No health claims are approved for it. In the European Union, methyl eugenol in flavourings and cosmetics is capped by law, which limits some oil products.
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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