Is Anthurium toxic to cats? (yes, calcium oxalates)

Yes, Anthurium is toxic to cats. Like all Araceae (Spathiphyllum, Monstera, Pothos, Philodendron, Calla, Dieffenbachia), it contains calcium oxalate crystals in all parts (leaves, spathes, spadices, stems, roots). Toxicity less serious than Dracaenas (saponins), but discomfort marked and the bright red spathe is particularly tempting for curious cats.

The danger: calcium oxalate crystals

Like all Araceae, Anthurium stores microscopic needle-shaped calcium oxalate crystals (raphides) in tissues. When a cat bites or chews, these crystals penetrate mouth tissues like micro-needles, immediately causing:

• Intense pain
• Inflammation
• Excessive salivation
• Sometimes irritating enzyme release

Plant defense mechanism against herbivores. Good side: pain is immediate and deterrent, cat generally stops after first contact.

Cat intoxication symptoms

Onset within minutes of contact or ingestion:

Immediate symptoms:

• Excessive salivation (main sign, sometimes white foam)
• Repeated mouth pawing
• Characteristic head movements
• Sudden refusal of all food

Secondary symptoms (1-6 hours):

• Vomiting
• Mild swelling of lips, tongue or throat
• Difficulty swallowing
• Temporary lethargy

Rare but possible cases:

• Severe oral edema (rare, may need vet)
• Respiratory issue if throat swelling

Real severity

Mortality rare. In vast majority, symptoms resolve in 24-48 hours without sequelae. Initial pain is deterrent: cat doesn’t continue chewing after first contact.

Increased risk for:

• Kittens (proportionally larger ingestion)
• Old or weakened cats
• Cats having chewed large quantities (rare due to deterrent pain)

The red spathe: specific danger

Anthurium particularity vs other Araceae: its bright waxy red spathe rises above foliage and visually attracts cats. Vivid color + waxy texture + accessible position = tempting combination for curious cat.

Increased monitoring during flowering periods (Anthurium can bloom year-round in good conditions, so permanent monitoring).

What to do in case of ingestion

Step 1: don’t panic. Most cats recover spontaneously in 24-48 hours.

Step 2: rinse mouth. If cat allows (rarely), gently rinse mouth with clear water to flush residual crystals.

Step 3: offer cold liquid. Milk, cold water, crushed ice. Cold soothes pain and dilutes crystals.

Step 4: monitor for 24 hours. Watch breathing, eating, behavior.

Step 5: consult vet if:

• Salivation persists more than 4 hours
• Repeated vomiting
• Difficulty breathing or swallowing
• Visible throat swelling
• Marked lethargy

Numbers to know (US): ASPCA Animal Poison Control 888-426-4435.

Prevention: keep out of reach

Anthurium being low and compact (30-60 cm), it’s easier to protect from cats than Dracaenas (miniature trees). Solutions:

Solution 1: high shelf. At least 1.80 m. Anthurium stays at compact height, unlike Dracaena which grows tall.

Solution 2: dedicated closed room. Office, spare bedroom where cat has no access.

Solution 3: hanging. Hanging pots if possible (Anthurium OK in hanging pot if good light).

Solution 4: olfactory deterrents. Citrus spray around pot, coffee grounds. Partial effect.

No solution without physical control is fully reliable.

Cat-safe alternatives

Plants non-toxic with similar spathes or colored presence:

• Calathea orbifolia: large decorative deep green leaves, non-toxic
• Phalaenopsis: flowering orchid, non-toxic to cats
• Spider plant (Chlorophytum comosum): easy, attracts cats but harmless
• Maranta leuconeura (prayer plant): colorful leaves, non-toxic
• Boston fern: green cloud, non-toxic

See also Anthurium toxic to dogs.