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Cherry Laurel
Prunus laurocerasus
Cherry Laurel (Prunus laurocerasus) is a widely planted evergreen shrub used for hedging and screening. Like other members of the Prunus genus (cherries, apricots, plums), its leaves, bark, and seeds contain prunasin — a cyanogenic glycoside that releases hydrogen cyanide (HCN) when crushed or chewed and digested. The mechanism is identical to apple seeds and apricot pits: enzymes break down prunasin, liberating toxic cyanide that halts cellular respiration. The berries themselves contain less cyanogenic material than the leaves and seeds but are still not safe.
Important Notes
Symptoms: Vomiting, rapid breathing, lethargy, weakness, low blood pressure, and in significant ingestion: seizures and respiratory failure from cyanide toxicity.
Leaves and seeds are most toxic: Wilted or damaged leaves release cyanide more readily than fresh ones — fallen or pruned branches are particularly dangerous.
Action: Treat as a veterinary emergency if a cat has chewed on leaves, bark, or seeds. Bring a sample of the plant for identification.
Potentially Toxic Parts
Leaf
Seed
Stem
Pit
Possible Symptoms Reported in Cats
Tachypnea (rapid breathing), dyspnea (difficulty breathing), or respiratory paralysis
Respiratory · Rapid (often within 10 to 60 minutes).
Tremors, seizures, dilated pupils, incoordination (ataxia), and sudden collapse
Neurological · Rapid (10–60 minutes).
Arrhythmias (irregular heart rate), hypotension (low blood pressure), and cardiac arrest
Cardiac · Rapid.
Brick red" gums and cherry-red blood
Hematological · Rapid (10–60 minutes).
Hypersalivation (drooling), vomiting, and diarrhea
Gastrointestinal · Rapid (often the first sign).
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.