PET SAFETY ANSWER · CITED TO ASPCA
Is Mistletoe safe for cats?
Why it's toxic
Toxic principles: phoratoxin, phoratoxins, viscotoxins, tyramine, phenylpropanolamine, alkaloids
Clinical signs in cats: vomiting, diarrhea, abdominal pain, difficulty breathing, slow pulse, collapse, possible death
Severity rating: severe
Source
Classification per the ASPCA Toxic and Non-Toxic Plants database entry for Mistletoe. Verified 2026-05-28. We update these answers when ASPCA changes the classification.