Cats
Potentially toxicConsulted references classify the plant as toxic or irritating for that pet type.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
cat safety reference
Is Madagascar Periwinkle safe for cats?
Catharanthus roseus
Catharanthus roseus is a flowering plant known for its vibrant blooms, but it contains alkaloids that are harmful if ingested by pets. It is commonly grown as an annual bedding plant or a container specimen.
Catharanthus roseusMadagascar periwinkleRose periwinkleVinca rosea
- Light
- Full sun to partial shade
- Habit
- Mounded or trailing
- Care
- Low
Safety status
What this means for your cat
Cats and Madagascar periwinkle don't mix. The plant carries vinca alkaloids — the same chemical family as some chemotherapy drugs — which can cause anything from a mild upset to seizures and dangerously low blood pressure. Most cats find the leaves bitter and stop after a nibble, so serious poisonings are rare but not impossible.
What to watch for
Mild cases: vomiting, diarrhea, drooling, depression, and loss of coordination. Heavier ingestions can produce tremors, seizures, low blood pressure (weakness, pale gums), and rarely coma. Watch the gums and energy level closely — those are the first hints that more than a nibble was swallowed.
Time window
Signs typically begin within a few hours of ingestion. Mild GI signs from a small ingestion usually resolve within 24 hours; severe cases may need 48 to 72 hours of supportive care.
When to call the vet
Call your vet or ASPCA Animal Poison Control (1-888-426-4435) the moment you confirm ingestion, even if your cat seems fine. Go in immediately for tremors, seizures, severe lethargy, pale or bluish gums, or any signs of weakness.
First aid at home
Remove any plant fragments from your cat's mouth and gently wipe the gums with a damp cloth, then call ASPCA APCC or your vet. Do not try to induce vomiting at home.
Sources: ASPCA, Pet Poison Helpline.
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Cats — concern notes
Common signs
Vomiting, diarrhea, depression, and potential cardiovascular issues.
Escalation note
Ingestion can lead to significant gastrointestinal distress and systemic effects due to the presence of vinca alkaloids. Please contact your veterinarian immediately if ingestion is suspected.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
Same cat verdict
Related plants for cats
Geranium
Pelargonium species
Geraniums are popular flowering plants known for their vibrant blooms and fragrant foliage. While they are common garden and container plants, they contain essential oils that can cause adverse reactions if ingested by pets.
Potentially toxic for cats & dogs.
Monstera
Monstera deliciosa
Monstera deliciosa is a popular tropical houseplant known for its large, fenestrated leaves and vining growth habit. It contains insoluble calcium oxalate crystals that can cause irritation if ingested by pets.
Potentially toxic for cats & dogs.
Snake Plant
Dracaena trifasciata
Dracaena trifasciata is a popular, hardy houseplant known for its stiff, sword-like leaves with striking yellow margins. It is widely appreciated for its air-purifying qualities and ability to thrive in various indoor conditions.
Potentially toxic for cats & dogs.
Philodendron
Philodendron spp.
Philodendrons are popular tropical foliage plants known for their lush, heart-shaped or split leaves. They contain insoluble calcium oxalate crystals that can cause irritation if ingested.
Potentially toxic for cats & dogs.