More than 1,000 children were treated in hospital for drug and alcohol-related illnesses last year.
According to freedom of information figures, over 63% were girls.
762 kids were aged between 10 and 17, and 264 were less than nine years old.
Dr Ciara Martin, a consultant paediatrician with Children's Health Ireland, is concerned at the number of teenagers presenting with alcohol issues.
"Probably the number we see is only the small tip of the iceberg of the actual number of children out there who are actually ingesting alcohol at a younger age.
"It tends to be the children that come into us are the ones who have collapsed, or maybe are found outside or are out with their friends and have taken more alcohol than their symptoms can cope with."
