Herbs

Hibiscus

Also called: roselle, hibiscus sabdariffa

Flowers made into a sour red tea.

Why people take it
Blood pressure.
What the evidence says
Small studies show modest blood pressure drops.
How it is usually taken
Usually 1 to 3 cups of tea a day.
Be careful
May add to blood pressure medicines.
Medicines it can interact with
Adds to blood pressure medicines; may affect paracetamol and some other medicine levels.

Other herbs

EchinaceaElderberryGarlic extractGingerPeppermint oilMilk thistleSaw palmettoSt John's wortValerianChamomileLemon balmPassionflowerKavaRhodiolaGinkgoMoringaFenugreekCinnamonBlack seedLicorice

Common questions

What is Hibiscus?

Flowers made into a sour red tea.

Why do people take Hibiscus?

Blood pressure.

Does Hibiscus work?

Small studies show modest blood pressure drops.

How much Hibiscus do people take?

Usually 1 to 3 cups of tea a day.

Is Hibiscus safe?

May add to blood pressure medicines.

Does Hibiscus interact with medicines?

Adds to blood pressure medicines; may affect paracetamol and some other medicine levels.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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