Administration of paracetamol (acetaminophen) has analgetic and antipyretic effect. After trauma paracetamol has an anti-inflammatory activity. It was presumed that paracetamol in therapeutic doses had fewer and more acceptable side-effects than other analgetic drugs such as acetylsalicylic acid and NSAID-drugs. However, in toxic concentrations, paracetamol is more life-threatening. The toxic effects of paracetamol most often occur in the liver and kidneys. Phosphate and lactate turn-over can also be impaired. Paracetamol poisoning can induce temporary liver dysfunction or even irreversible liver failure with liver transplantation as the only therapeutic possibility. Chronic alcoholics are especially at risk, as liver damage may occur following paracetamol even in recommended doses. When intoxication with paracetamol is presumed, administration of N-acetylcysteine is vital. N-acetylcysteine therapy should be initiated not later than 15 hours after paracetamol intake. Moreover, the antitoxic effect has been observed even when N-acetylcysteine therapy is initiated 24-36 hours after presumed paracetamol intake. Measures of preventing further absorbtion of paracetamol from the gastrointestinal tract should be taken. Activated charcoal should be given if less than two hours have passed since paracetamol intake. Between two and four hours following paracetamol intake gastric lavage should be performed. During the last 10 years the incidence of paracetamol self-poisoning has increased, but death following paracetamol poisoning is relatively constant at around nine per year in Denmark. It is suggested that the incidence of serious cases of paracetamol poisoning could be reduced by simple measures. Special attention should be paid to the risk-group of chronic alcoholics.