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Tomato vs. Bittersweet Nightshade: which is safe for cats and dogs?

Tomato and Bittersweet Nightshade are frequently compared because both belong to the Solanum genus, a group well-known for containing solanine alkaloids. It is important for pet owners to recognize that both of these plants are potentially toxic to cats and dogs. While the risks associated with the green foliage of a garden Tomato are significant, Bittersweet Nightshade poses a particularly dangerous threat due to its attractive but poisonous berries. Because both plants can cause serious gastrointestinal and systemic distress if ingested, neither is considered safe to keep within reach of your pets. Always monitor your animals closely around these plants and consult a veterinarian if ingestion occurs.

Tomato

Solanum lycopersicum

The tomato plant is a popular garden vegetable that contains solanine, a glycoalkaloid found in its stems and leaves. While the fruit is generally consumed by humans, the green parts of the plant can cause adverse reactions if ingested by pets.

cat

Potentially toxic

Consulted references classify the plant as toxic or irritating for that pet type.

Watch for

Hypersalivation, gastrointestinal upset, diarrhea, vomiting, and potential lethargy.

dog

Potentially toxic

Consulted references classify the plant as toxic or irritating for that pet type.

Watch for

Vomiting, diarrhea, abdominal pain, drowsiness, and in severe cases, changes in heart rate or coordination.

Full Tomato reference →

Bittersweet Nightshade

Solanum dulcamara

Climbing Nightshade is a perennial vine in the nightshade family known for its star-shaped purple flowers and bright red berries. It contains solanine alkaloids that are harmful to pets if ingested.

cat

Potentially toxic

Consulted references classify the plant as toxic or irritating for that pet type.

Watch for

Drooling, vomiting, diarrhea, lethargy, and in severe cases, tremors or cardiac arrhythmias.

dog

Potentially toxic

Consulted references classify the plant as toxic or irritating for that pet type.

Watch for

Gastrointestinal upset including vomiting and diarrhea, hypersalivation, weakness, and potential neurological signs like dilated pupils or tremors.

Full Bittersweet Nightshade reference →