Azalea

Azaleas and rhododendrons come home in spring as potted or decorative plants across many households, but they are highly dangerous to cats. The entire plant — leaves, flowers, and even the nectar — contains grayanotoxin, a nerve-and-heart toxin. Even a small amount can start vomiting, diarrhea, and drooling, and as it progresses it can lead to irregular heartbeat, collapse, and heart failure.

Other Ericaceae plants with the same toxin

Grayanotoxin isn't limited to azaleas — it's found in other shrubs of the heath family too. A common garden example is mountain laurel (Kalmia); it looks different but shares the same toxin and the same risk. Keep heath-family shrubs out of your cat's space regardless of the variety.

How cats get exposed

The rule is not to bring one into a space you share with your cat at all. If you grow them on a balcony or in the yard, keep them fully separated from your cat's paths and clear away fallen blossoms and leaves before the day ends. Potted gifts often get set down in the living room without thought, so make a habit of checking whether a plant is safe before bringing it in.

How symptoms progress

Signs usually begin within 2–6 hours with drooling, vomiting, and diarrhea. Grayanotoxin disrupts signaling in nerve and heart muscle, so as it advances the pulse can turn irregular, blood pressure can drop, and the cat may stagger or slip into collapse. The cardiac effect can surface late, so don't be lulled by mild early symptoms.

What to do right now

If you suspect ingestion, don't wait even if symptoms look mild — head to a 24-hour emergency vet immediately. Work out what and how much was eaten and tell the vet; it helps guide treatment considerably.