Toxic — keep away from pets
Yes — azaleas and rhododendrons are seriously toxic to dogs and cats. Even a few leaves can cause vomiting, weakness and dangerous heart problems.
Azaleas and rhododendrons contain grayanotoxins, which interfere with nerve and muscle function, including the heart. Unlike plants that only irritate the mouth, these can cause genuinely dangerous effects: severe vomiting, drooling, weakness, abnormal heart rhythms, a drop in blood pressure, and in serious cases collapse, coma or death. Just a small amount of leaves can be enough to make a pet very ill, which is why these common garden shrubs deserve real caution.
Both dogs and cats are affected, and the toxin is potent enough that even small ingestions warrant veterinary attention. These shrubs are widespread in gardens and parks worldwide.
Treat any ingestion as an emergency — call your vet or a poison helpline straight away, even if your pet seems okay, because heart effects can develop. Keep pets away from azalea and rhododendron shrubs and clippings, including fallen leaves.
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General information, not veterinary advice. If your pet has eaten a toxic plant or shows symptoms, contact your vet or a pet poison helpline immediately. Full disclaimer.