Southern blue gum Toxic?

Updated 2026-03-06| 3 min read| 1,480 found this helpful

The intact whole Eucalyptus globulus plant is non-toxic to humans, cats, dogs, and horses

Only concentrated extracted eucalyptus oil from the plant carries measurable toxicity risks

Nearly all other Eucalyptus species are non-toxic, with very low risk of confusion-related poisoning

FAQ

Is Southern blue gum toxic to Humans?

Nausea, vomiting, diarrhea, dizziness, and respiratory irritation if large volumes of concentrated eucalyptus oil are ingested or inhaled (Low)

Is Southern blue gum toxic to Cats?

Excessive drooling, gastrointestinal upset, lethargy, and mild liver stress in severe cases of concentrated eucalyptus oil ingestion (Low)

Is Southern blue gum toxic to Dogs?

Vomiting, diarrhea, excessive salivation, depression, and muscle weakness following exposure to concentrated eucalyptus oil (Low)

Is Southern blue gum toxic to Horses?

Mild gastrointestinal irritation, reduced appetite, and lethargy if concentrated eucalyptus oil is ingested accidentally (Low)

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Toxicity Details

Humans

Low

Nausea, vomiting, diarrhea, dizziness, and respiratory irritation if large volumes of concentrated eucalyptus oil are ingested or inhaled

Cats

Low

Excessive drooling, gastrointestinal upset, lethargy, and mild liver stress in severe cases of concentrated eucalyptus oil ingestion

Dogs

Low

Vomiting, diarrhea, excessive salivation, depression, and muscle weakness following exposure to concentrated eucalyptus oil

Horses

Low

Mild gastrointestinal irritation, reduced appetite, and lethargy if concentrated eucalyptus oil is ingested accidentally

Toxicity Snapshot

Toxic PartsThe intact whole plant is non-toxic; only concentrated, refined eucalyptus oil extracted from plant tissue is toxic

Exposure RouteIngestion of concentrated eucalyptus oil, inhalation of undiluted eucalyptus oil vapor, skin contact with undiluted concentrated eucalyptus oil

Toxic CompoundsEucalyptol (1,8-cineole); Volatile terpenes present in concentrated eucalyptus oil

First Aid & Prevention

First 30 Minutes

• Rinse mouth thoroughly with clean water if concentrated eucalyptus oil is ingested
• Wash affected skin with mild soap and running water for 10+ minutes for skin exposure
• Move to fresh open air immediately if exposed to high volumes of eucalyptus oil vapor
• Do not induce vomiting unless explicitly instructed by a medical professional or veterinarian

Contact Vet Immediately

• If your pet has ingested more than 1mL of concentrated eucalyptus oil
• If your pet shows persistent symptoms like drooling, vomiting, or lethargy post-exposure
• If your pet has pre-existing liver or respiratory conditions prior to exposure

Prevention

• Store concentrated eucalyptus oil products out of reach of children and domestic pets
• Avoid using undiluted eucalyptus oil in spaces accessible to cats, dogs, or horses
• Do not feed large volumes of eucalyptus plant clippings to livestock as a precaution

Treatment & Prognosis

• Supportive fluid therapy to flush residual toxins from the body
• Symptomatic care for gastrointestinal upset, respiratory irritation, or allergic reactions
• Liver function monitoring for 24-48 hours post-exposure in severe ingestion cases

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Professional Toxicology

Scientific NameEucalyptus globulus Labill.

AliasesBlue eucalyptus、Common eucalyptus、Tasmanian blue gum、Fever tree、Blue gum tree

Toxicity Grade

HumansLow

CatsLow

DogsLow

HorsesLow

Target Organs

Gastrointestinal tractRespiratory tractLiver (high dose exposure cases)Central nervous system

Mechanism of Action

• Concentrated eucalyptus oil acts as an irritant to gastrointestinal and respiratory mucosal linings

• High doses of eucalyptol may disrupt central nervous system function in severe exposure cases

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Low risk; ingestion of large volumes of eucalyptus oil may cause mild gastrointestinal distress

Caged birds: Moderate risk; inhalation of concentrated eucalyptus oil vapor can cause severe respiratory irritation

Small companion rodents (rabbits, guinea pigs): Low to moderate risk; ingestion of eucalyptus oil may cause digestive upset and central nervous system depression

Confusion Risk

The following plants look similar and may be confused:

Other Eucalyptus species Eucalyptus spp.

Most other Eucalyptus species have similar leaf and bark morphology to Eucalyptus globulus; all are non-toxic in whole plant form, with toxicity risk across the genus only linked to concentrated extracted essential oils

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Related Toxic Plants

Tea tree

Melaleuca alternifolia

Low to moderate toxicity, concentrated essential oil is toxic if ingested

Manuka

Leptospermum scoparium

Low toxicity, concentrated essential oil poses adverse reaction risk for domestic pets

Clove tree

Syzygium aromaticum

Moderate toxicity, concentrated clove oil is highly irritating if ingested or applied undiluted topically

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Data Sources

1. CliniTox (Universität Zürich)

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