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Poppy
Papaver spp.
Poppy (Papaver spp.) is toxic to cats due to the presence of isoquinoline alkaloids — including morphine, codeine, papaverine, and related opioid compounds in opium poppy (Papaver somniferum), and non-opioid isoquinolines in other species. All parts of the plant contain these alkaloids, with the highest concentration in the seed pod latex.
Important Notes
Toxic compounds: isoquinoline alkaloids (opioid and non-opioid types depending on species); seed pod latex most concentrated
Mechanism: opioid alkaloids bind to mu-opioid receptors, causing CNS and respiratory depression; cats are particularly sensitive to opioids
Symptoms: sedation, lethargy, pin-point pupils, slow or laboured breathing, loss of coordination, vomiting; severe cases cause respiratory failure
Even ornamental (non-opium) poppy species contain irritant alkaloids that cause GI upset
Any suspected poppy ingestion warrants prompt veterinary evaluation due to opioid sensitivity in cats
Potentially Toxic Parts
Entire Plant
Possible Symptoms Reported in Cats
Collapse
Gastrointestinal · Not specified in the sources.
Dilated pupils
Gastrointestinal · Not specified in the sources.
Vomiting
Gastrointestinal · Not specified in the sources.
Lack of coordination
Gastrointestinal · Not specified in the sources.
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.