A man has been sentenced to three months in prison for breaching an anti-social behaviour order (ASBO).
It is believed to be the first jail sentence imposed in Ireland for this offence.
Last year, five people alleged to be involved in drug activity were served with ASBOs by Dublin District Court and ordered to stay away from an area in the city centre for 12 months.
One person breached the order five times by entering an area around O'Connell Street, North Earl Street and Abbey Street and today received a three-month sentence.
Richard Guiney, of the Dublin Business Improvement Districts group, which has campaigned to have drug-related activity reduced in the city centre, said he believed that ASBOs can be as successful in Ireland as they have been in Britain.
He said: "The city has an average daily footfall of 328,000, while a mere handful are creating the inaccurate perception that the city is less than safe."