Thujone is reported to be toxic to brain, kidney, and liver cells and could cause convulsions if used in too high a dose. ... Side effects from the essential oil of this plant include anxiety, sleeplessness, and convulsions, which confirms the central nervous system effects of thujone.

What are the effects of thujone?

When taken by mouth, thujone can cause seizures, muscle breakdown (rhabdomyolysis), kidney failure, restlessness, difficulty sleeping, nightmares, vomiting, stomach cramps, dizziness, tremors, changes in heart rate, urine retention, thirst, numbness of arms and legs, paralysis, and death.

Why is thujone bad for you?

Thujone: A ketone monoterpene, this compound blocks GABA receptors, which are neurotransmitters, making thujone a neurotoxin. The side effects include vomiting and seizures.