✕ Toxic

Hyacinth

Q: Is Hyacinth toxic to cats?

Warning: Toxic. Hyacinth (Hyacinthus spp.) is a spring bulb plant that is toxic to cats. The bulb is the most dangerous part, but the leaves and flowers can also cause problems if chewed or eaten. Hyacinths contain alkaloids, including lycorine-like compounds, that can irritate the stomach and trigger vomiting. The plant can also contain calcium oxalate crystals, which add mouth and throat irritation when a cat bites it. A cat may drool, vomit, have diarrhea, paw at the mouth, or seem tired after exposure. Eating bulb pieces is more concerning than nibbling a leaf. Keep bulbs, potted hyacinths, and cut flowers away from cats, and call a veterinarian if your cat eats any part or shows repeated vomiting.

Q: What are the symptoms if a cat eats Hyacinth?

Profuse Drooling, Vomiting, and Diarrhea, Mouth and Throat Irritation (Burns), Difficulty Breathing (Dyspnea) or Respiratory Depression, Increased Heart Rate (Tachycardia) or Arrhythmias, Tremors or Depression

Hyacinthus spp.

Hyacinth (Hyacinthus spp.) is a spring bulb plant that is toxic to cats. The bulb is the most dangerous part, but the leaves and flowers can also cause problems if chewed or eaten. Hyacinths contain alkaloids, including lycorine-like compounds, that can irritate the stomach and trigger vomiting. The plant can also contain calcium oxalate crystals, which add mouth and throat irritation when a cat bites it. A cat may drool, vomit, have diarrhea, paw at the mouth, or seem tired after exposure. Eating bulb pieces is more concerning than nibbling a leaf. Keep bulbs, potted hyacinths, and cut flowers away from cats, and call a veterinarian if your cat eats any part or shows repeated vomiting.

Important Notes

Toxic compounds: lycorine and phenanthridine alkaloids (highest in bulb), calcium oxalate crystals in sap

Mechanism: lycorine directly activates the brainstem emetic centre; at higher doses causes vasodilation and CNS depression

Symptoms: profuse vomiting, diarrhea, drooling, tremors; severe bulb ingestion may cause low blood pressure, rapid heart rate, or convulsions

Bulbs are the most dangerous part — particularly relevant during planting or when stored indoors

Contact your vet if your cat ingests any part of the plant, especially the bulb

Potentially Toxic Parts

Stem

Entire Plant

Pollen

Leaf

Flower

Bulb

Possible Symptoms Reported in Cats

Profuse Drooling, Vomiting, and Diarrhea

Gastrointestinal · Acute (Clinical signs typically appear quickly after ingestion).

Difficulty Breathing (Dyspnea) or Respiratory Depression

Respiratory · Variable (Associated with large ingestions or heavy exposure).

Increased Heart Rate (Tachycardia) or Arrhythmias

Cardiac · Delayed (Associated with systemic absorption after large ingestions).

Tremors or Depression

Neurological · Variable.

Mouth and Throat Irritation (Burns)

Gastrointestinal · Immediate (upon chewing).

Disclaimer: This summary was compiled from multiple sources and is for informational use only. It is not a diagnosis or treatment plan. Toxicity can vary based on the substance, amount, plant part, and individual cat. If you think your cat may have been exposed to a toxic substance, contact a veterinarian right away.