Library/Asphodelaceae/Aloe/Vera
Last reviewed ·

Aloe
Vera.

Aloe vera

!
The verdict
Toxic — not a cat remedy

Saponins and anthraquinones in the gel and latex. Aloe is a human first-aid plant that the ASPCA lists as toxic to cats — vomiting and lethargy are common after ingestion.

Botanical plate — Aloe Vera rosette with thick spined leaves
⚠ Toxic to cats
10 cm

Plate IAloe vera — the familiar succulent on kitchen windowsills. Cats often chew succulents out of curiosity.

§ I · Safe lookalikes

Three plants that look the part, without the risk.

Rosette succulents without aloe's saponins — the best ASPCA non-toxic swaps for a sunny windowsill.

Haworthia
◦ Cat safe

Haworthia

Haworthia attenuata

The closest rosette match — striped succulent leaves in the same small pot on a sunny sill.

From £14
Buy on Amazon →
Christmas Cactus
◦ Cat safe

Christmas Cactus

Schlumbergera bridgesii

Segmented succulent stems with seasonal blooms. Non-toxic epiphyte, not desert cactus.

From £18
Buy on Amazon →
Spider Plant
◦ Cat safe

Spider Plant

Chlorophytum comosum

Forgiving green on the same windowsill if you prefer leaves over rosettes. Non-toxic.

From £18
Buy on Amazon →
At a glance
Toxicity
Moderatesaponins
Onset
Hoursvomiting, lethargy
All parts
Toxicgel & latex
Also avoid
Aloe spp.similar succulents
Human use
Topical OKingestion ≠ safe for cats

What it does to a cat.

Yes — aloe vera is toxic to cats. The ASPCA lists Aloe vera as toxic. Cats that chew leaves ingest saponins and anthraquinone compounds that irritate the gut and can cause vomiting, diarrhoea, lethargy, and in some cases tremors or reddish urine.

Aloe's reputation as a healing plant creates a dangerous assumption: what soothes human skin is not safe in a cat's stomach. Keep plants off windowsills cats patrol, and never add aloe to food or water.

Succulents are not automatically safe

Cats gravitate toward thick leaves. Many popular succulents — jade, kalanchoe, aloe — are toxic. Christmas cactus is a rare exception: ASPCA non-toxic, segmented stems, and seasonal colour.

If your cat ate aloe

Remove remaining plant material, note how much was chewed, and call your vet. ASPCA Animal Poison Control at (888) 426-4435 can help quantify risk. Do not treat at home with human laxatives or induced vomiting unless directed.

Safer sunny-sill plants

Spider plant tolerates the same bright window. Boston fern suits humid kitchens where aloe often lives. Both are non-toxic per ASPCA.

“Aloe heals human scrapes and upsets feline stomachs — the same leaf is two different medicines, only one of which the cat asked for.”
§ II · Observed effects

What we have actually seen.

Obs. 01

Vomiting & diarrhoea

Primary GI signs from saponins and anthraquinone glycosides. Often within 6–12 hours of ingestion.

◦ Common
Obs. 02

Lethargy & tremors

Cats may become quiet or unsteady. Report to your vet — severity varies with amount eaten.

◦ Common
Obs. 03

Red urine

Anthraquinones can colour urine reddish. Mention to your vet if you notice this after known ingestion.

◦ Occasional
Obs. 04

Chronic leaf chewing

Succulent texture attracts cats. Move aloe behind glass or out of the home entirely.

◦ Common
§ V · Sources & references
  1. ASPCA Animal Poison Control Center. Toxic and Non-Toxic Plants: Aloe.Accessed May 2026 · aspca.org
cat safe plants · Pl. XIX
— if in doubt, look it up —
May 2026