Eucalyptus oil (EO) intoxications are rare. We present a case of 58 yrs old chemist, who due to intense delusions consumed 4-5 drops of concentrated EO in order to self-medication of ascariasis. Despite the low dose of ingested xenobiotic the course of poisoning was severe. The intoxication was complicated with acute lung and heart injury, tachycardia and hypertension. Most of the clinical symptoms and biochemical abnormalities disappeared after the treatment.