Pencil cactus, also known as aveloz or avelós, is an ornamental plant that has attracted attention for its potential anti-inflammatory, analgesic, antifungal, antibacterial, and anticancer properties. Even though it has been used traditionally in certain regions, research is still evolving, and safety concerns remain significant.
This plant goes by several names, including pencil cactus, milk bush, firestick plant, pencil tree, aveloz, naked lady, and sticks-on-fire. It naturally grows in northeastern Brazil and may also be found as a liquid latex or in capsule preparations in some local markets. Despite these traditional uses, its safety profile has made it a highly controversial plant.
Because of its toxic effects, pencil cactus (Euphorbia tirucalli) is not approved for medicinal use by FDA in the United States. Documented risks include skin burns, tissue necrosis, stomach ulcers, and even blindness, making unregulated use especially dangerous.
Possible uses
Pencil cactus is traditionally used to help with:
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Skin cysts
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Calluses
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Rheumatism
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Arthritis
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Sprains
It has also been studied for potential activity against the fungus responsible for candidiasis, as well as for effects on bacterial infections such as Staphylococcus aureus and E. coli. Early research has explored its possible anticancer properties, especially for skin, colon, and rectal cancers.
In some cultures, pencil cactus is also used for constipation, sore throat discomfort, and cough.
Pencil cactus properties
Although toxic, the latex of pencil cactus has been described as having anti-inflammatory, analgesic, and wound-healing properties.
The plant has also shown antifungal, antibacterial, and anticancer activity in preliminary research, particularly involving skin, colon, and rectal cancers. However, more scientific studies are needed to confirm whether these effects are safe or effective.
How to use
Traditionally, pencil cactus is taken orally by diluting one drop of the latex in 200 mL of water and drinking it gradually throughout the day.
For topical use, some preparations involve mixing one drop of latex with a tablespoon of coconut oil or petroleum jelly to make a homemade ointment.
However, using pencil cactus either orally or on the skin is not considered safe and is not approved for medicinal purposes by the FDA due to the plant’s toxicity.
Possible side effects
Possible side effects from pencil cactus use include itching, burning, swelling, blistering, burns, and skin necrosis.
When the latex is swallowed in excess or without proper dilution, it may cause vomiting, diarrhea, severe stomach irritation, and ulcers.
If the latex comes into contact with the eyes, it can cause intense burning and damage to the cornea and conjunctiva, potentially leading to permanent blindness.
Who should not use
Pencil cactus use is not recommended without supervision from a trained herbal medicine specialist. Due to its toxic nature and lack of reliable safety studies, its use poses significant health risks.