Educational information, not medical advice — ask your doctor or midwife.
Cactus is a herbal remedy made from the stem and flowers of a night-blooming cactus. The plant is now called Selenicereus grandiflorus. It was long sold under the older name Cactus grandiflorus.
It grows in Mexico, Central America and the Caribbean. The large white flowers open at night, which gives it the name Night-blooming Cereus. The fresh plant is picked and soaked in alcohol to make a tincture.
American Eclectic doctors used it in the 1800s as a heart remedy. They gave it for a racing, pounding or fluttering heart. Today you will mostly find it as a tincture or as homeopathic drops.
Here is the honest verdict. Human evidence for Cactus is very thin, and modern trials are almost absent. Long use in a tradition is not proof that something works, and it is not proof that it is safe.
That matters more here than with most herbs. The symptoms Cactus was used for, such as chest pain and an odd heartbeat, can be signs of serious heart disease. Those need a doctor, not a self-chosen herb.
No one has shown how Cactus works in people. There is no accepted mechanism, and the old explanations were never tested properly.
Eclectic doctors believed it acted on the heart muscle and the nerves that set heart rhythm. That idea came from bedside impressions, not from measurement.
In animal and test-tube work, extracts of the plant have shown some effect on heart muscle and blood vessels. These findings are early and limited. Whether anything similar happens in a person taking a tincture is not established.
The plant contains small amounts of amines, including tyramine. In the body, tyramine can raise blood pressure, which is why one drug interaction below is taken seriously. The amount in a few drops of tincture is small, and its real effect in people has not been measured.
Homeopathic forms are diluted far past the point where plant material remains. Any effect from those products is not explained by the chemistry of the plant.
You will most often meet Cactus in liquid form. The common liquid forms are:
- Fresh-plant tincture, usually made with alcohol. - Homeopathic mother tincture and diluted potencies, such as 3X or 6C. - Drops sold as part of combination heart or nerve tonics.
Capsules of dried stem also exist. They are much less common.
Strength varies a lot between brands. Fresh-plant tinctures and homeopathic dilutions are very different products, even when the label looks similar.
The fresh plant is not eaten as a food. Do not treat garden cactus and this remedy as the same thing.
Cactus entered Western practice in the 1860s. An Italian doctor, Rubini, reported using it for heart complaints. The remedy spread quickly to homeopaths and then to American Eclectic doctors.
Eclectic writers of the late 1800s listed it for a weak, rapid or irregular pulse. They also used it for chest pain and for what they called a nervous heart. It appeared in their standard texts for several decades.
Use faded once real heart drugs arrived and were tested. The remedy survived mainly in homeopathy and in folk tonics. These are historical accounts of practice, not a reason to treat yourself.
Call emergency services now if you have chest pain that spreads to the arm, neck or jaw. Do the same for sudden breathlessness, fainting, or a heartbeat that will not settle.
Stop the remedy and see your doctor if you notice a slow, fast or irregular pulse. Do the same for dizziness, swelling of the ankles, or a rash.
Book a check-up before trying it at all if your heart symptoms are new or getting worse.
In the United States it is sold as a dietary supplement and as a homeopathic product. In the UK and EU it is sold as a homeopathic remedy or a traditional herbal tincture. No country licenses it as a heart medicine.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Cactus is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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