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Caladium Poisoning in Cats: Signs, Treatment, and Prevention

PawAI Lab
5 min read

Understand how caladium poisoning affects cats, what signs to watch for, and what steps to take if you suspect your cat has been exposed.

Quick Answer

Caladium poisoning in cats may cause gastrointestinal and other effects that warrant veterinary evaluation. Many common houseplants contain calcium oxalate crystals including pothos, philodendron, dieffenbachia, peace lily, and calla lily. Cats that chew houseplants are at risk. If you suspect poisoning, contact a veterinarian or animal poison-control service for guidance.

Before using any tool, contact a veterinary professional if your cat may have been exposed.

  • US: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • UK: Animal PoisonLine (01202 509000) or your nearest veterinary emergency clinic
  • Canada: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • AU: Animal Emergency Centre or your regular vet
  • EU: Contact your nearest veterinary emergency service

TOXICITY CHECKER

Check whether a substance may be harmful to your pet and get prioritized safety steps.

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This tool provides general safety information and does not replace veterinary advice in an emergency.

Safety Verdict

Toxic. Needle-like calcium oxalate crystals penetrate soft tissues of the mouth, tongue, and throat when the plant is chewed, causing immediate pain and swelling. Some species also release proteolytic enzymes that intensify inflammation.

Many common houseplants contain calcium oxalate crystals including pothos, philodendron, dieffenbachia, peace lily, and calla lily. Cats that chew houseplants are at risk.

What Is Caladium?

Caladium contains insoluble calcium oxalate crystals. Chewing the colorful leaves causes immediate pain, drooling, and swelling of the mouth and throat.

How Caladium Poisoning Affects Cats

The toxic principle in caladium is insoluble calcium oxalate crystals. Needle-like calcium oxalate crystals penetrate soft tissues of the mouth, tongue, and throat when the plant is chewed, causing immediate pain and swelling. Some species also release proteolytic enzymes that intensify inflammation.

The severity of caladium poisoning in cats depends on several factors:

  • The amount consumed or the extent of exposure
  • The route of exposure (ingestion, skin contact, inhalation)
  • The cat's body weight, age, and overall health
  • Whether the substance was in concentrated or diluted form
  • How quickly veterinary treatment is initiated

Usually not life-threatening but very painful. Severe throat swelling can occasionally compromise breathing.

Signs of Caladium Poisoning in Cats

Common signs include:

  • Immediate oral pain
  • Excessive drooling
  • Swelling of lips, tongue, or throat
  • Difficulty swallowing
  • Vomiting
  • Loss of appetite
  • Rarely, difficulty breathing

Timeline: Signs appear immediately or within minutes.

Emergency signs requiring immediate veterinary attention:

  • Difficulty breathing
  • Severe throat swelling
  • Excessive drooling that does not stop
  • Signs of distress

The absence of signs does not necessarily rule out risk, particularly with substances that have delayed effects. Veterinary evaluation is recommended even if your cat appears normal after known exposure.

What to Do If You Suspect Poisoning

  1. Contact a veterinarian or animal poison-control service for guidance.
  2. Remove any remaining substance from your cat's reach.
  3. Offer fresh water if your cat is willing to drink.
  4. Monitor for signs and contact a veterinarian if they develop or worsen.

Have this information ready:

  • Your cat's age, weight, breed, and any medical conditions
  • The specific product or plant name and its ingredients if known
  • Estimated amount consumed and time of exposure
  • Current symptoms and when they started
  • Product packaging, plant photos, or remaining material

If only a small amount was chewed and your cat is eating and drinking normally with mild drooling, monitoring may be appropriate after consulting a veterinarian.

When to Contact a Veterinarian

Contact a veterinarian or animal poison-control service immediately if you suspect caladium poisoning. Many common houseplants contain calcium oxalate crystals including pothos, philodendron, dieffenbachia, peace lily, and calla lily.

Emergency signs that require urgent veterinary attention:

  • Difficulty breathing
  • Severe throat swelling
  • Excessive drooling that does not stop
  • Signs of distress

Non-urgent follow-up: If only a small amount was chewed and your cat is eating and drinking normally with mild drooling, monitoring may be appropriate after consulting a veterinarian.

FAQ

Which houseplants contain calcium oxalate crystals?

Many common houseplants including pothos, philodendron, dieffenbachia, peace lily, calla lily, Chinese evergreen, caladium, and monstera.

Are calcium oxalate plants life-threatening?

They are rarely life-threatening. The crystals cause immediate pain that usually prevents large consumption. However, severe throat swelling can compromise breathing.

How are these ingestions treated?

Treatment may include rinsing the mouth, pain medication, anti-inflammatories, and monitoring. Most cats recover within hours to a day.

TOXICITY CHECKER

Concerned about another plant, food, medication, or household item around your cat? Get general, species-aware safety information to help you decide your next step.

Try Toxicity Checker

This tool provides general safety information and does not replace veterinary advice.

Sources

Disclaimer

This article and the PawAI Toxicity Checker tool provide general safety information and do not replace examination, diagnosis, or treatment by a licensed veterinarian. If your cat may have ingested a toxic substance, contact a veterinarian, emergency clinic, or animal poison control immediately.