What are the symptoms of Grapefruit poisoning in cats?

vomiting, diarrhea, lethargy, trembling, skin sensitivity to sunlight

Grapefruit

Q: Can cats eat Grapefruit?

Caution: Avoid — psoralen and essential oils are toxic. Grapefruit contains psoralens and essential oils limonene and linalool that are toxic to cats, concentrated primarily in the peel, seeds, and white pith. Cats' limited liver glucuronidation makes them especially vulnerable to these compounds. GI upset, CNS depression, and photosensitivity can result. Source: ASPCA.

Caution

Verdict

Avoid — psoralen and essential oils are toxic.

Toxic principle: psoralens, limonene, linalool

Source: ASPCA · Verified 2026-06-12

Verdict

Grapefruit contains psoralens and essential oils limonene and linalool that are toxic to cats, concentrated primarily in the peel, seeds, and white pith. Cats' limited liver glucuronidation makes them especially vulnerable to these compounds. GI upset, CNS depression, and photosensitivity can result.