Mint Toxic?

Updated 2026-03-06| 3 min read| 2,796 found this helpful

Mentha sp.

Mint is confirmed toxic to cats, dogs, and horses per ASPCA toxicity data

The primary toxic components of mint are its naturally occurring essential oils

Adverse clinical signs only appear after ingestion of large volumes of mint material

FAQ

Is Mint toxic to Humans?

No documented severe toxicity in humans; mild gastrointestinal upset may occur with extremely large intake (Low)

Is Mint toxic to Cats?

Vomiting and diarrhea after ingestion of large quantities of the plant (Low)

Is Mint toxic to Dogs?

Vomiting and diarrhea after ingestion of large quantities of the plant (Low)

Is Mint toxic to Horses?

Vomiting and diarrhea after ingestion of large quantities of the plant (Low)

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Toxicity Details

Humans

Low

No documented severe toxicity in humans; mild gastrointestinal upset may occur with extremely large intake

Cats

Low

Vomiting and diarrhea after ingestion of large quantities of the plant

Dogs

Low

Vomiting and diarrhea after ingestion of large quantities of the plant

Horses

Low

Vomiting and diarrhea after ingestion of large quantities of the plant

Toxicity Snapshot

Toxic PartsAerial plant parts (leaves, stems) containing concentrated essential oils

Exposure RouteIngestion of plant material, skin or respiratory exposure to concentrated mint essential oils

Toxic CompoundsEssential Oils

First Aid & Prevention

First 30 Minutes

• Remove all remaining mint plant material from the exposed animal's mouth and surrounding area
• Monitor the animal closely for early signs of nausea, drooling, or abdominal discomfort
• Do not induce vomiting unless explicitly instructed to do so by a licensed veterinarian

Contact Vet Immediately

• The animal exhibits persistent vomiting, diarrhea, or obvious abdominal pain post-ingestion
• The ingested substance is concentrated mint essential oil rather than fresh/dried plant matter
• The animal shows signs of lethargy, loss of appetite, or dehydration after exposure

Prevention

• Keep potted mint plants and concentrated mint essential oils out of reach of pets and grazing horses
• Avoid adding raw mint or mint extracts to pet food, treats, or bedding without veterinary approval
• Fence off wild mint patches in horse grazing areas to prevent accidental large-volume ingestion

Treatment & Prognosis

• Supportive care including fluid therapy to correct dehydration from gastrointestinal losses
• Administration of veterinarian-prescribed gastrointestinal protectants and anti-emetics
• Symptomatic management of any secondary adverse reactions as they present

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Professional Toxicology

Scientific NameMentha sp.

AliasesGarden Mint

Toxicity Grade

HumansLow

CatsLow

DogsLow

HorsesLow

Target Organs

Gastrointestinal tract

Mechanism of Action

• Essential oils in mint irritate the gastrointestinal mucosal lining, triggering inflammatory responses that lead to vomiting and diarrhea

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Rabbits: Mild gastrointestinal distress may occur with large ingestions, no reported severe toxicity

Pet birds: Exposure to concentrated mint essential oils can cause respiratory irritation, fresh plant ingestion is generally low risk

Confusion Risk

The following plants look similar and may be confused:

Pennyroyal Mentha pulegium

Both belong to the Mentha genus with similar serrated leaves and minty scent; pennyroyal is far more toxic, even in small doses, and can cause organ failure

Lemon Balm Melissa officinalis

Both are Lamiaceae family plants with similar ovate, serrated leaves; lemon balm has a distinct citrus scent instead of a sharp mint aroma

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Related Toxic Plants

Lavandula angustifolia

Low to moderate toxicity

Oregano

Origanum vulgare

Low toxicity

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Data Sources

1. ASPCA Animal Poison Control

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

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