Over 300 pints of homemade alcohol were seized at Castlerea Prison last year - despite efforts to clamp down on contraband.
According to the Irish Examiner, prison officers made more than 1,100 drug seizures in Irish prisons in 2018, along with seizures of mobile phones and weapons.
During searches, prison officers also seized over 750 pints of homemade alcohol, known as hooch.
The largest quantity of over 300 pints was confiscated at Castlerea Prison, with 107 pints seized in Cork Prison and 192 pints in Mountjoy.
The Irish Prison Service says preventing the access of contraband into prisons remains a high priority for them.