The prisoner is four-and-a-half years into a six-year sentence.

The 10 suspected overdoses by people at Portlaoise Prison have been linked to a synthetic opioid known as nitazene

Detective Chief Superintendent Seamus Boland said nitazene had been responsible for ‘multiple overdoses’ in recent months.

Saoirse Brady, the executive director of the Irish Penal Reform Trust, said prisons are 'overstretched' with a record number of people incarcerated

The Irish Prison Service said it is working closely with the HSE and has secured extra naloxone kits

Mr Justice Rory Mulcahy found Eddie Campbell, who was employed in Portlaoise Prison, had not made out a strong case against his dismissal which was likely to succeed. He therefore refused to continue an injunction restraining his dismissal