Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Milkweed - what should I do?
Asclepias species
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Vomiting, diarrhea, weakness, difficulty breathing, and in severe cases, cardiac arrhythmias or tremors.
Escalation note
Ingestion can lead to serious systemic effects due to cardiac glycosides. Please contact your veterinarian or an animal poison control center immediately if ingestion is suspected.
First aid at home
Remove your cat from the plant and take any leaves or sap out of the mouth. Do NOT induce vomiting unless explicitly told to by a veterinarian or Pet Poison Helpline — your vet may use activated charcoal or controlled emesis depending on timing. Bring a sample or photo of the plant to the clinic.
What to watch for
Early signs: vomiting, profound depression, weakness, anorexia, diarrhea. Progression to severe: seizures, difficulty breathing, rapid weak pulse, dilated pupils, kidney or liver failure, coma, respiratory paralysis, and death. Treat any milkweed exposure as potentially severe — not mild GI upset.
Time window
ASPCA reports onset of clinical signs within the first 2 hours after exposure, with signs persisting up to 4–5 days. Pet Poison Helpline notes most pets recover within a day or two of receiving treatment.
When to call the vet
Call immediately. Don't wait for symptoms — call your vet, the ASPCA APCC (888-426-4435), or Pet Poison Helpline (855-764-7661) the moment you suspect ingestion. This plant can cause cardiac arrhythmias; early treatment matters.
What this means for your cat
Milkweed is a serious problem for cats. Every part of the plant carries cardiac glycosides (cardenolides) that interfere with the heart's electrolyte balance, and some Asclepias species also contain neurotoxins. Cats are most at risk indirectly — by eating monarch caterpillars or butterflies that have fed on milkweed — but chewing the plant itself is also dangerous.
Sources: ASPCA, Pet Poison Helpline.
Source references
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.