Matricaria chamomilla / Chamaemelum nobile
Why is it risky?
Chamomile contains bisabolol, chamazulene, anthemic acid, and pyrethrin-like compounds in some species. ASPCA lists chamomile as toxic to cats. Regular or significant ingestion causes GI irritation, dermatitis, and in large amounts, potential anticoagulant effects and neurological signs. Despite its widespread use as a human calming supplement, it should not be administered to cats.
Affected Systems
Digestive · Skin
Symptoms
Vomiting, diarrhea, anorexia, contact dermatitis with topical use. Large amounts: potential anticoagulation, muscle weakness.
What To Do
Monitor for GI symptoms. Do not administer chamomile tea or supplements to cats as a calming agent.
Notes
Chamomile is frequently recommended online as a "natural calming agent" for anxious cats, this is inappropriate and potentially harmful. Evidence-based alternatives for feline anxiety: gabapentin (prescribed by vet), Feliway pheromone diffuser (synthetic F3 facial pheromone), Zylkene (bovine milk protein hydrolysate, consult vet). Contact with chamomile flowers may cause skin sensitization in some individuals.
Sources
→ ASPCA Animal Poison Control Center — aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/chamomile
→ Pet Poison Helpline — petpoisonhelpline.com