Oregano (Greek Oregano) Toxic?

Oregano is classified as toxic to cats, dogs and horses per ASPCA data
Ingestion typically triggers only mild, self-resolving vomiting and diarrhea
No formal animal poisoning cases are documented, but it is never suitable for animal feed
FAQ
Is Oregano (Greek Oregano) toxic to Humans?
No specific human toxicity data available; very large ingestions may cause mild GI upset (Low)
Is Oregano (Greek Oregano) toxic to Cats?
Mild vomiting and diarrhea (Low)
Is Oregano (Greek Oregano) toxic to Dogs?
Mild vomiting and diarrhea (Low)
Is Oregano (Greek Oregano) toxic to Horses?
Mild vomiting and diarrhea (Low)
Toxicity Details
No specific human toxicity data available; very large ingestions may cause mild GI upset
Mild vomiting and diarrhea
Mild vomiting and diarrhea
Mild vomiting and diarrhea
Toxicity Snapshot
First Aid & Prevention
First 30 Minutes
- • Remove all remaining oregano from the animal's mouth and immediate environment
- • Rinse the animal's mouth with cool clean water if it is conscious and not in distress
- • Monitor closely for onset of vomiting, diarrhea or lethargy for the first 3 hours post exposure
Contact Vet Immediately
- • Vomiting is severe, contains blood, or persists for more than 2 hours
- • Diarrhea lasts over 12 hours, or is paired with lethargy, appetite loss or abdominal pain
- • The exposed animal is a horse or has pre-existing gastrointestinal conditions
Prevention
- • Never feed oregano or high-oregano foods to cats, dogs or horses
- • Keep potted oregano plants and dried oregano out of reach of pets and livestock
- • Confirm identity of all foraged herbs before offering them as animal feed
Treatment & Prognosis
- • Supportive fluid therapy to prevent dehydration from vomiting and diarrhea
- • Veterinarian-prescribed anti-emetics to control persistent vomiting
- • Symptomatic management of GI discomfort as directed by a licensed vet
Professional Toxicology
• Irritant compounds inflame the gastrointestinal tract mucosal lining after ingestion, triggering vomiting and diarrhea
Information from CliniTox veterinary text.
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Data Sources
This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.