The mistake was discovered shortly after the dose was given and the boy had to be treated with antidote.

The overdose meant that the boy had to be monitored in the neonatal ward, and had to undergo repeated sampling, according to a Lex Maria report.

After the incident, the boy was feeling well and showed no signs of paracetamol poisoning, according to the report, which was made by the responsible at the children's unit at the hospital.