Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Bittersweet Nightshade - what should I do?
Solanum dulcamara
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
Drooling, vomiting, diarrhea, lethargy, and in severe cases, tremors or cardiac arrhythmias.
Escalation note
Ingestion of any part of the plant, especially the berries, can be dangerous. Please contact your veterinarian or an animal poison control center immediately if you suspect ingestion.
What to watch for
ASPCA lists hypersalivation (drooling), vomiting, and diarrhea as the common signs in cats. Less commonly: drowsiness/lethargy, low blood pressure (weak pulse, pale gums), and a slow heart rate. Severe ingestions can progress to weakness, tremors, or trouble breathing — those are emergencies.
Time window
Onset of GI signs is typically within a few hours of ingestion. Recovery from minor exposures can occur within hours; serious cases may take 24–48 hours of supportive veterinary care. Exact timing is not well documented in the ASPCA listing.
When to call the vet
Call your vet or ASPCA Animal Poison Control (888-426-4435) any time you find chewed berries or know your cat ate the plant — and call immediately for a cat that is weak, wobbly, breathing oddly, has very pale gums, or is unresponsive. Don't wait for symptoms if a kitten or small cat ate berries; smaller body mass means a smaller dose to cause trouble.
What this means for your cat
Cats — toxic. ASPCA classifies climbing/bittersweet nightshade as toxic to cats; the toxic principle is solanine, a steroidal alkaloid concentrated most heavily in the unripe green berries and leaves. Cats rarely chew bitter foliage on purpose, so most exposures involve a curious cat batting and biting the bright red ripe berries.
Sources: ASPCA (no first-aid guidance).
Source references
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.