Pothos and Philodendron Poisoning in Dogs
Pothos (Epipremnum aureum) and philodendrons are staple houseplants found in millions of homes. They are also among the most frequent causes of plant-related calls to poison control for pets. Both contain insoluble calcium oxalate crystals that cause immediate burning and irritation when chewed.
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⚡ Immediate Actions
- 1Rinse your dog's mouth with cool water for 1–2 minutes
- 2Do not induce vomiting — it will worsen oral and throat irritation
- 3Call your vet or ASPCA Poison Control (888) 426-4435
- 4Offer a small amount of milk or water to soothe the mouth if the dog will accept it
- 5Monitor breathing — throat swelling is rare but possible with large ingestion
Symptoms & Timeline
Immediate (within minutes of chewing)
The calcium oxalate raphide mechanism is identical to dieffenbachia — chewing ruptures idioblast cells and fires needle crystals into oral tissues. The immediate pain response is intense and proportional to the number of crystals discharged. Swelling develops within minutes as histamine and inflammatory mediators are released at the injury sites.
- Pawing at face
- Excessive drooling
- Oral pain and whimpering
- Swollen lips or tongue
- Difficulty swallowing
GI upset (30 min–2 hours)
Crystals that are swallowed continue damaging the esophageal and gastric mucosa as they pass through. The mechanical injury to the stomach lining triggers nausea and vomiting. With larger ingestions, crystals reaching the intestinal lining cause additional inflammation and increased motility, producing diarrhea.
- Vomiting
- Loss of appetite
- Nausea
- Diarrhea (with large ingestion)
How Pothos & Philodendron (Epipremnum, Philodendron) Affects Dogs
Like other Araceae, pothos and philodendron contain calcium oxalate raphide crystals stored in idioblast cells. Mechanical pressure from chewing causes explosive discharge of the needle-shaped crystals into oral and pharyngeal mucosa, causing immediate pain and inflammation. Philodendrons also contain enzymes that can contribute to tissue damage. Systemic toxicity is rare with typical exposure but can occur with large ingestion.
What Your Vet Will Do at the Clinic
Pothos and philodendron management follows the same crystal-removal and anti-inflammatory protocol as other Araceae plants. Mouth rinsing with cool water removes surface crystals immediately. The vet assesses the depth and extent of oral swelling and whether it has spread to the pharynx or larynx. Anti-inflammatory drugs reduce the progression of swelling from the crystal-triggered inflammatory cascade. Vomiting is avoided because it re-exposes the esophagus to crystals already lodged in the plant material. Anti-nausea medication is given if the GI upset from swallowed crystals persists. For the vast majority of typical exposures — a dog chewing one or two leaves — the reaction is self-limiting and resolves within a few hours once the source of crystal discharge is gone.
Step-by-step protocol:
- 1Rinse mouth with cool water to remove calcium oxalate crystals from oral tissues
- 2Do NOT induce vomiting — worsens esophageal and throat irritation
- 3IV fluids for severe vomiting or significant GI involvement
- 4Anti-inflammatory medication for oral and esophageal swelling
- 5Monitoring airway for signs of throat swelling or breathing difficulty
- 6Anti-nausea medication if vomiting is persistent
Frequently Asked Questions
Is pothos more or less toxic than philodendron?
Both cause similar symptoms and are considered equally dangerous for pets. The severity depends on how much was ingested. Heartleaf philodendron (Philodendron hederaceum) and golden pothos (Epipremnum aureum) are the most commonly encountered species in homes.
My dog only ate one small leaf. Do I need to go to the vet?
A small amount is unlikely to cause serious harm in a larger dog, but you should still call your vet. If your dog is pawing at their mouth, drooling heavily, or showing signs of distress, a vet visit is warranted. For very small dogs, even a small amount can be more significant.
How can I dog-proof my home plants?
Place pothos and philodendrons on high shelves, use hanging planters, or move them to rooms the dog cannot access. Alternatively, replace them with dog-safe alternatives like spider plants, Boston fern, or orchids.
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