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Is American Bittersweet Toxic to Cats?

☠️ ToxicSeverity: Moderate
✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit
⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.
Yes, American bittersweet is toxic to cats. Its berries and leaves contain compounds that cause vomiting, diarrhea and, in larger amounts, weakness and seizures.

Also known as: Climbing Bittersweet, Waxwork, Staff Vine, Celastrus scandens · Celastrus scandens

What makes it toxic

Celastrus alkaloids and other unconfirmed irritant compounds concentrated in the showy orange berries. They irritate the gut and can depress the nervous system in bigger doses.

Warning signs to watch for

Drooling, vomiting, diarrhea and loss of appetite within a few hours. Larger ingestions may progress to weakness, tremors, seizures or collapse.

What to do if your cat eats it

Remove berries and plant material, rinse the mouth and call your vet the same day. Any seizure, tremor or collapse means an immediate emergency clinic visit.

Common questions

Are the decorative berry vines dangerous if my cat chews them?

Yes. Dried arrangements keep the toxic compounds, so autumn decoration vines are as risky as the growing plant. Keep wreaths and garlands away from pets.

Is American bittersweet as dangerous as Oriental bittersweet?

Both are toxic with similar stomach and nervous-system signs. Do not assume the native species is the safe one.

More plants checked for cats

This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.