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Rhododendron and azalea
Rhododendron
A professional reference for veterinary specialists. It does not replace clinical judgement.
Species and toxic dose
| Species | Risk | Toxic dose |
|---|---|---|
| Dog | Toxic | Not established in the open sources |
| Cat | Toxic | Not established in the open sources |
Toxic principle
Grayanotoxins (diterpenes, mainly grayanotoxin I) keep sodium channels open.
Onset
Signs may last several days.
Clinical signs
Salivation, vomiting, diarrhoea, weakness, dyspnoea; hypotension, bradycardia or bradyarrhythmia, AV block, heart failure; convulsions, coma. In dogs also lethargy, ataxia, yawning, head rubbing.
Organs affected
Heart, central nervous system, digestive tract.
Treatment principle (for veterinarians)
Decontamination and supportive care, with heart rhythm and blood pressure monitored; the sources name no specific therapy.
In the reference: Atropine
A summary of the principles in the sources, not a protocol: doses and the plan are the treating veterinarian's decision.
Sources
- Reference book. ASPCA Animal Poison Control Center. Toxic and non-toxic plants: azalea. aspca.org
- Scientific article. Bertero A, Fossati P, Caloni F. Indoor companion animal poisoning by plants in Europe. Frontiers in Veterinary Science 7:487 2020
- Scientific article. Siroka Z. Toxicity of house plants to pet animals. Toxins 15(5):346 2023
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