Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Spreading Dogbane - what should I do?
Apocynum androsaemifolium
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, drooling, cardiac arrhythmias, and lethargy.
Escalation note
Ingestion can lead to serious cardiac distress. Please contact your veterinarian or an animal poison control center immediately if ingestion is suspected.
What to watch for
ASPCA reports diarrhea (possibly with blood), slow heart rate, and weakness. Pet Poison Helpline adds vomiting, severe cardiac arrhythmias, and possible seizures from cardiac glycoside exposure.
Time window
Onset and recovery timing are not specifically documented for this plant in either ASPCA or Pet Poison Helpline; Pet Poison Helpline states that any exposed pet should be evaluated and treated symptomatically.
When to call the vet
Call any time you suspect a cat has chewed or swallowed any part of the plant. Cardiac arrhythmias can develop before visible weakness, and bloody diarrhea or collapse is an emergency.
What this means for your cat
Cats: keep away. The toxic principle is cardenolides — the same class of cardiac glycoside found in foxglove and digoxin — which interfere directly with electrolyte balance in heart muscle. Pet Poison Helpline notes the plant is bitter-tasting, so casual nibbling is uncommon, but any ingestion is a heart-rhythm emergency.
Sources: ASPCA, Pet Poison Helpline (no first-aid guidance beyond contacting a vet).
Source references
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.