Mediterranean cypress Toxic?

Updated 2026-03-06| 5 min read| 1,335 found this helpful
Mediterranean cypress
1

All plant parts are toxic; contact with wood dust, cut branches, or burnt plant smoke causes contact dermatitis and asthma attacks

2

Ingestion of large amounts leads to gastrointestinal distress, seizures, coma, and permanent liver/kidney damage

3

No specific antidote exists; seek immediate medical or toxicology center support after exposure or suspected ingestion

FAQ

Is Mediterranean cypress toxic to Humans?

Contact dermatitis from cut branches, wood dust, or burnt plant smoke; asthma attacks; cross-allergy to rosin is common. Ingestion of large quantities causes gastrointestinal symptoms including bloody vomiting, tonic-clonic seizures, coma, liver and kidney damage (Moderate)

Is Mediterranean cypress toxic to Cats?

No specific toxicity data available for this species; consult a veterinarian immediately if ingestion is suspected (Unknown)

Is Mediterranean cypress toxic to Dogs?

No specific toxicity data available for this species; consult a veterinarian immediately if ingestion is suspected (Unknown)

Is Mediterranean cypress toxic to Horses?

No specific toxicity data available for this species; consult a veterinarian immediately if ingestion is suspected (Unknown)

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Toxicity Details

Humans
Moderate

Contact dermatitis from cut branches, wood dust, or burnt plant smoke; asthma attacks; cross-allergy to rosin is common. Ingestion of large quantities causes gastrointestinal symptoms including bloody vomiting, tonic-clonic seizures, coma, liver and kidney damage

Cats
Unknown

No specific toxicity data available for this species; consult a veterinarian immediately if ingestion is suspected

Dogs
Unknown

No specific toxicity data available for this species; consult a veterinarian immediately if ingestion is suspected

Horses
Unknown

No specific toxicity data available for this species; consult a veterinarian immediately if ingestion is suspected

Toxicity Snapshot

Toxic PartsAll plant parts
Exposure RouteSkin contact (cut branches, wood dust), inhalation (wood dust, burning plant smoke), ingestion of plant material
Toxic CompoundsThujone (monoterpene); Tropolone; Picric acid (lignan derivative)

First Aid & Prevention

First 30 Minutes

  • • For ingestion: Administer activated charcoal suspension/powder at 1g/kg body weight within 1-2 hours of ingestion, only if the patient is conscious
  • • For skin contact: Rinse affected area thoroughly with cool soapy water to reduce dermatitis risk
  • • For inhalation of dust/smoke: Move to fresh air immediately, monitor for breathing difficulties

Contact Vet Immediately

  • • Suspected ingestion of any amount of the plant by cats, dogs, or horses
  • • Development of skin rashes, respiratory distress, seizures, or bloody vomiting after exposure
  • • Exposure in children, elderly, or immunocompromised individuals

Prevention

  • • Wear gloves, long sleeves, and a respiratory mask when cutting or handling the plant, or working with its wood
  • • Do not burn cypress plant material, avoid inhaling any smoke from burnt cypress
  • • Keep plant parts out of reach of children and pets

Treatment & Prognosis

  • • Consult a doctor or toxicology center immediately after ingestion for further clinical guidance
  • • No specific antidote is available, treatment is fully supportive based on presented symptoms
  • • Manage allergic reactions with antihistamines or corticosteroids as directed by a healthcare provider
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Professional Toxicology

Scientific NameCupressus sempervirens L.
AliasesEchte Zypresse、Mittelmeer-Zypresse、Säulen-Zypresse、Italienische Zypresse、Trauer-Zypresse、Cyprès、Cyprès commun、Cyprès sempervirent、Cyprès toujours vert、Cyprès d'Italie、Cyprès de Provence、Cyprès mediterranéen、Cipresso comune、Cipresso mediterraneo
Toxicity Grade
HumansModerate
CatsUnknown
DogsUnknown
HorsesUnknown
Target Organs
SkinRespiratory tractGastrointestinal tractLiverKidneysNervous system
Mechanism of Action

• Thujone and other active compounds irritate skin and respiratory mucosa on contact or inhalation

• Ingestion of large quantities causes systemic toxicity affecting gastrointestinal, nervous, hepatic and renal systems

• Cross-allergic reactions occur in individuals sensitized to rosin

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

General livestock: Toxicity not formally documented; avoid providing access to cypress plant material to prevent potential adverse reactions
Confusion Risk

The following plants look similar and may be confused:

Other cypress species Other Cupressus spp.
Visually similar growth forms and scale-like foliage; toxicity levels vary across related Cupressus species
Northern white cedar Thuja occidentalis
Nearly identical scale-like evergreen foliage; this species is severely toxic, carrying higher risk than Mediterranean cypress
Lawson's false cypress Chamaecyparis lawsoniana
Similar columnar evergreen conifer appearance; this species is confirmed toxic to humans and animals
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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.

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