Lily Toxicity in Cats: Every Part of This Flower is Deadly
⚠ Toxicity Profile
| Scientific Name | Lilium spp. and Hemerocallis spp. |
|---|---|
| Toxic Principles | Unknown Nephrotoxin (All Parts Toxic) |
| Danger Level | Extreme (Emergency — Every Minute Counts) |
| Toxic Dose Limit | 0.01 g/kg |
| Target Organ | Kidneys (Tubular Epithelial Necrosis) |
True lilies (Lilium species) and daylilies (Hemerocallis species) are among the most lethal household plants for cats. Every part of the plant is toxic — petals, leaves, stem, pollen, and even the water in the vase. Ingestion of less than one leaf or a few grains of pollen groomed from the fur can cause irreversible kidney failure within 24-72 hours.
The Silent Killer
The exact nephrotoxin in lilies remains unknown to veterinary science — this makes antidote development impossible. The toxin causes renal tubular epithelial cell necrosis: the cells lining the kidney's filtration tubules die and slough off, physically blocking urine production.
Symptoms Timeline
Phase 1 (0-12 hours): Vomiting, drooling, lethargy, loss of appetite — these may be mild and easily missed. Phase 2 (12-24 hours): Apparent improvement — the cat may seem to recover. This is a false recovery. Kidney damage is occurring silently. Phase 3 (24-72 hours): Acute kidney failure — severe vomiting, complete cessation of urination (anuria), extreme lethargy, seizures, death. Once the cat enters Phase 3, even aggressive treatment (dialysis) has only a 50% survival rate.
Critical Window
Treatment must begin before Phase 3. If you see your cat near lilies — even if you didn't witness ingestion — seek emergency veterinary care immediately. Decontamination (inducing vomiting, activated charcoal) and aggressive IV fluid therapy started within 6 hours of exposure is typically curative. Every hour delayed after 18 hours dramatically reduces survival probability.
🔬 Pet Toxicity Risk Evaluator
Enter your pet's weight and the estimated amount consumed to assess toxicity risk — calculated locally in your browser.
🚨 If Your Pet Has Been Exposed
DO NOT WAIT for symptoms to appear. Contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 immediately. Have your pet's weight, the substance involved, estimated amount consumed, and time of ingestion ready. The risk calculator above is an educational estimate only — individual animal responses vary based on age, breed, pre-existing conditions, and concurrent substance ingestion.