Hanrahan, Michael T and Millar, Seán R and Mongan, Deirdre and Lyons, Suzi and Galvin, Brian (2025) Prevalence of problematic opioid use in Ireland, 2020–2022. Dublin: Health Research Board.

Muttucomaroe, Lauren and Millar, Seán and Hanrahan, Michael T and Mongan, Deirdre and Joyce, Mary and Corcoran, Paul and Byrne, Michael (2025) Problem drug use in Cork City: a study on prevalence and harms. Cork: University College Cork.

Hanrahan, Michael T and O'Mahony, Mary and McLoughlin, Darren and Sheahan, Anne (2025) Examination of patients presenting to the emergency department as “apparently drunk”. Irish Journal of Medical Science , 194 , pp. 375-384.

Hanrahan, Michael T and Millar, Seán and Phillips, Karl P and Reed, Thomas E and Mongan, Deirdre and Perry, Ivan J (2022) Problematic opioid use in Ireland, 2015–2019. Dublin: Health Research Board.