Why is this dangerous?
All parts of the plant contain grayanotoxins, which lock open sodium channels in nerve and muscle cells. The result is drooling, vomiting, a very slow heart rate and low blood pressure.
Only about 0.2% of body weight is reported to cause poisoning — for a 10 kg dog that is roughly 20 g of leaves, which is a small mouthful.
Why speed matters
Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.
Signs to watch for
- Heavy drooling, vomiting, watery eyes and nose
- Very slow heart rate, weakness, collapse
- Low blood pressure, pale gums, cold limbs
- Wobbliness, tremors, seizures in severe cases
- Signs usually start within 1–2 hours of eating
What to do right now
- Treat this as an emergency — heart rate can drop quickly, so call ahead and go in.
- Bring a cutting or photo of the plant so the species can be confirmed.
- Do not induce vomiting unless the vet tells you to.
- Keep the pet warm and still on the way; the vet may need to give fluids and heart-rate support.
If your pet shows any of the signs above, go to the nearest emergency vet now and call ahead.
The step-by-step response, from the first minute to the vet visit, is in our Azalea & Rhododendron emergency guide.