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Constituents of aromatic plants: eucalyptol
M De Vincenzi1, M Silano, A De Vincenzi
1Department of Metabolism and Pathological Biochemistry ISS, Rome, Italy. mbpsegr@iss.it
Fitoterapia
|June 6, 2002
Summary
Eucalyptol toxicity studies indicate mice are less susceptible than rats. While toxic in male rats above 600 mg/kg, mice showed no effects up to 1200 mg/kg, suggesting species-specific responses.
Area of Science:
- Toxicology
- Pharmacokinetics
- Eucalyptol Metabolism
Background:
- Subacute toxicity studies in rats and mice indicate differential susceptibility to eucalyptol.
- Previous research highlights eucalyptol metabolism involves hydroxylated bicyclic products and ring-opening metabolites in rats and possums.
Purpose of the Study:
- To evaluate the comparative toxicity of eucalyptol in different species.
- To understand the metabolic fate of eucalyptol.
- To assess the implications of eucalyptol exposure in humans.
Main Methods:
- Gavage administration of eucalyptol in rodent toxicity studies.
- Analysis of eucalyptol metabolites in animal models.
- Review of human accidental exposure cases.
Main Results:
- Mice demonstrated lower susceptibility to eucalyptol toxicity compared to rats.
- Eucalyptol was toxic in male rats at doses exceeding 600 mg/kg, whereas mice tolerated up to 1200 mg/kg without observed effects.
- Metabolites, including hydroxylated bicyclic products and ring-opened compounds, were identified in rats and brushtail possums.
Conclusions:
- Eucalyptol exhibits species-specific toxicity, with mice being less susceptible than rats.
- The identified metabolites provide insight into eucalyptol's pharmacokinetic profile.
- Human exposure data, though limited, indicates potential for severe outcomes but also instances of recovery.