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Professor Eamon Edward Keenan
Clinical Professor, Public Health & Primary Care

Publications and Further Research Outputs

Peer-Reviewed Publications

Evans D, Keenan E, Re-evaluation of the numbers of people involved in substance misuse in Ireland using the National Drug Treatment Reporting System (NDTRS) and the Central Treatment List (CTL), Irish Journal of Medical Science, 2023 Journal Article, 2023 DOI

Durand L, Boland F, Harnedy N, Delargy Í, Scully M, Bourke M, Ebbitt W, Vázquez MO, Keenan E, Cousins G, Impact of changes to the delivery of opioid agonist treatment, introduced during the COVID-19 pandemic, on treatment access and dropout in Ireland: An interrupted time series analysis, Journal of Substance Use Addiction Treatment, 2023 Journal Article, 2023 DOI

Smyth BP, Davey A, Keenan E, Deterence Effect of Penalties on Adolescent Cannabis Use, Irish Journal of Psychological Medicine, 2023 Journal Article, 2023 DOI

Gráinne Cousins, Louise Durand, Aoife O'Kane, Julie Tierney, Richard Maguire, Siobhán Stokes, Deirdre O'Reilly, Ella Arensman, Kathleen E Bennett, María Otero Vázquez, Paul Corcoran, Suzi Lyons, Yvonne Kavanagh, Eamon Keenan, Prescription drugs with potential for misuse: protocol for a multi-indicator analysis of supply, detection and the associated health burden in Ireland between 2010 and 2020, BMJ Open, 2023, p1 - 9 Journal Article, 2023 DOI

Lucas Wiessing, V Sypsa, AO Abagiu, A Arble, N Berndt, A Bosch, S Buskin, D Chemtob, B Combs, C Conyngham, J Feelemyer, M Fitzgerald, D Goldberg, A Hatzakis, RE Patrascu, E Keenan, I Khan, S Konrad, J Leahy, A McAuley, T Menza, S Merrick, R Metcalfe, T Rademaker, S Revivo, P Rosca, C Seguin-Devaux, S Skinner, C Smith, J Tinsley, M Wilberg, D Des Jarlais, Impact of COVID-19 & Response Measures on HIV-HCV Prevention Services and Social Determinants in People Who Inject Drugs in 13 Sites with Recent HIV Outbreaks in Europe, North America and Israel, 2022 Journal Article, 2022 DOI

Psycho-Active Substance Use in, editor(s)O'Dwyer AM, Campion M , Practical Psychiatry for Students and Trainees, TCD, Oxford University Press, 2022, [O'Dwyer AM, Campion M] Book Chapter, 2022 DOI

Giulini F, Keenan E, Killeen N, Ivers J-H, ASystematized review of Drug-Checking and Related Considerations for Implementation as a Harm Reduction Intervention, Journal of Psychoactive Drugs, 2022 Journal Article, 2022 DOI

Zorina Gibbons, Peter McCarron, Kiran Santlal, Roisin McCarthy, and Eamon Keenan, Baclofen in the treatment of alcohol withdrawal syndrome in opioid-dependent patients, Heroin Addiction and Related Clinical Problems, 24, (3), 2022, p21 - 27 Journal Article, 2022

Mongan D, Killeen N, Evans D, Millar SR, Keenan E, Galvin B, European Web Survey on Drugs 2021:Irish Results, Dublin Health Research Board, Health research Board, August, 2022, 1-67 Report, 2022 URL

McCarron P., Smyth B., Carroll G., Glynn M., Barry J., Whiston L., Keenan E., Darker C., Truszkowska E., Patterns of new psychoactive substance use among opioid-dependent patients attending for opioid substitution treatment, HEROIN ADDICTION AND RELATED CLINICAL PROBLEMS, 24, (1), 2022, p21 - 29 Journal Article, 2022 URL

Durand, Louise, Keenan, Eamon, Boland, Fiona, Harnedy, Norma, Delargy, Ide, Scully, Mike, Mayock, Paula, Ebbitt, William, Otero Vázquez, Maria,Corrigan, Nicola' Killeen, Nicki, Pate, Muriel, Byrne, Paula and Cousins, Grainne , Consensus recommendations for opioid agonist treatment following the introduction of emergency clinical guidelines in Ireland during the COVID-19 pandemic: a national Delphi study., International Journal of Drug Policy, 106, (August), 2022 Journal Article, 2022 DOI

M McNicholas M Scully E Keenan, An overview of recent advances in opioid agonist treatment (OAT), Irish Journal of Psychological Medicine, 2021 Journal Article, 2021 DOI

Eagleton M, Stokes, S, Fenton, F, Keenan E, Therapeutic potential of long-acting opioids and opioid antagonists for SARS-CoV-2 infection, British Journal of Anaesthesia, 2021 Journal Article, 2021 DOI

Durand L, Boland F, O'Driscoll D, Bennett K, Barry J, Keenan E, Fahey T, Cousins G, Factors associated with early or later dropout from methadone maintenance treatment in specialist addiction clinics: a six year cohort study using proportional hazards frailty models for recurrent treatment episodes, Drug and Alcohol Dependence, 219, 2021 Journal Article, 2021 DOI

Hennigan K, Corrigan E, Killeen N, Scully M, Keenan E, , Overview of tertiary addiction services response to Opioid Dependence during the Covid 19 pandemic, Irish Journal of Psychological Medicine, 2021, p1 - 14 Journal Article, 2021 DOI

Jo-Hanna Ivers, Nicki Killeen, Eamon Keenan, Drug use, harm‑reduction practices and attitudes toward the utilisation of drug safety testing services in an Irish cohort of festival‑goers, Irish Journal of Medical Science, 2021 Journal Article, 2021 DOI

Eagleton M, Stokes, S, Fenton, F, Keenan E, Does opioid substitution treatment have a protective effect on the clinical manifestations of COVID-19? Comment on Br J Anaesth 2020; 125: e382-3., British Journal of Anaesthesia, 126, (3), 2021, pe114 - e116 Journal Article, 2021 DOI

Durand, L., O'Driscoll, D., Boland, F., Keenan, E., Ryan, B.K., Barry, J., Bennett, K., Fahey, T., Cousins, G., Do interruptions to the continuity of methadone maintenance treatment in specialist addiction settings increase the risk of drug-related poisoning deaths? A retrospective cohort study, Addiction, 2020 Journal Article, 2020 DOI

Lisa Moran, Eamon Keenan, Khalifa Elmusharaf, Semi-Structured Interviewing: Researching Clients' Perspectives on the Barriers to Progressing Optimally Through a Methadone Maintenance Treatment Program, SAGE Research Method Cases, 2020 Report, 2020

Des Jarlais, D.C., Sypsa, V., Feelemyer, J., Abagiu, A.O., Arendt, V., Broz, D., Chemtob, D., Seguin-Devaux, C., Duwve, J.M., Fitzgerald, M., Goldberg, D.J., Hatzakis, A., Jipa, R.E., Katchman, E., Keenan, E., Khan, I., Konrad, S., McAuley, A., Skinner, S., Wiessing, L., HIV outbreaks among people who inject drugs in Europe, North America, and Israel, The Lancet HIV, 7, (6), 2020, pe434-e442 Journal Article, 2020 DOI

Kiran Santlal, Peter McCarron, Eamon Keenan, Fiona Fenton, Treatment of GHB withdrawal in the G detoxification clinic in the HSE National Drug Treatment Centre: An update on servic eprovision and patient outcomes, College of Psychiatrist of Ireland Spring Conference (1st Prize), Castleknock, Dublin, 3rd -5th April 2019, 2019 Poster, 2019 URL

Moran, L., Keenan, E., Elmusharaf, K., Barriers to progressing through a methadone maintenance treatment programme: Perspectives of the clients in the Mid-West of Ireland's drug and alcohol services, BMC Health Services Research, 18, (1), 2018 Journal Article, 2018 DOI

Glynn, R.W., Byrne, N., O'Dea, S., Shanley, A., Codd, M., Keenan, E., Ward, M., Igoe, D., Clarke, S., Chemsex, risk behaviours and sexually transmitted infections among men who have sex with men in Dublin, Ireland, International Journal of Drug Policy, 52, 2018, p9-15 Journal Article, 2018 DOI

Lynn, T.M., Lynn, E., Keenan, E., Lyons, S., Trends in injector deaths in ireland, as recorded by the national drug-related deaths index, 1998"2014, Journal of Studies on Alcohol and Drugs, 79, (2), 2018, p286-292 Journal Article, 2018 URL

Annika Gibbons, Aisling McGrath, Peter McCarron, Zorina Gibbons, Eamon Keenan, Opiate-dependent service-users knowledge and attitudes towards supervised injecting facilities, Royal College of Psychiatrists, Faculty of Addictions Annual Conference, Europa Hotel, Belfast, 26th - 27th April, edited by Royal College of Psychiatrists , 2018 Poster, 2018

Ivers JH, Zgaga L, Sweeney B, Keenan E, Darker C, Smyth BP, Barry J., A naturalistic longitudinal analysis of post-detoxification outcomes in opioid-dependent patients., Drug and Alcohol Review, 37, (S1), 2018, p339 - 347 Journal Article, 2018 TARA - Full Text DOI

Joyce, N., MacNeela, P., Sarma, K., Ryall, G., Keenan, E., The Experience and Meaning of Problematic `G" (GHB/GBL) Use in an Irish Context: an Interpretative Phenomenological Analysis, International Journal of Mental Health and Addiction, 16, (4), 2018, p1033-1054 Journal Article, 2018

Klimas, J., Fairgrieve, C., Tobin, H., Field, C.-A., O'Gorman, C.S., Glynn, L.G., Keenan, E., Saunders, J., Bury, G., Dunne, C., Cullen, W., Psychosocial interventions to reduce alcohol consumption in concurrent problem alcohol and illicit drug users, The Cochrane database of systematic reviews, 12, 2018, pCD009269 Journal Article, 2018 DOI

Ní Cheallaigh C, O'Leary A, Keating S, Bergin C, Telementoring with project ECHO: a pilot study in Europe, BMJ Innovations, 3, (3), 2017, p144--151 Journal Article, 2017 DOI

Cousins G, Boland F, Barry J, Lyons S, Keenan E, O'Driscoll D, Bennett K, Fahey T, J-shaped relationship between supervised methadone consumption and retention in methadone maintenance treatment (MMT) in primary care: National cohort study, Drug and Alcohol Dependence, 173, 2017, p126 - 131 Journal Article, 2017 DOI

Aisling McGrath, Zorina Gibbons, Peter McCarron, Annika Gibbons, Eamon Keenan, Opiate-dependent service-users knowledge and attitudes towards drug decriminalisation, College of Psychiatrists, Ireland Winter Conference, Dunboyne Castle, Meath, 16th - 17th November, edited by College of Psychiatrists , 2017 Poster, 2017 URL

McCombe G., Henihan A., Klimas J., Klimas J., Swan D., Leahy D., Anderson R., Bury G., Dunne C., Keenan E., Meagher D., O"Gorman C., O"Toole T., Saunders J., Smyth B., Lambert J., Kaner E., Cullen W., Enhancing alcohol screening and brief intervention among people receiving opioid agonist treatment: qualitative study in primary care, Drugs and Alcohol Today, 16, (4), 2016, p247-258 Journal Article, 2016 DOI

Darker, C., Sweeney, B., Keenan, E., Whiston, L., Anderson, R., & Barry, J. , Tailoring a brief intervention for illicit drug use and alcohol use in Irish methadone maintained opiate dependent patients: a qualitative process. , BMC Psychiatry , 16, (373), 2016 Journal Article, 2016 DOI TARA - Full Text

Henihan A., McCombe G., Klimas J, Swan D., Leahy D., Anderson R., Bury G., Dunne C., Keenan E., Lambert J., Meagher D., O'Gorman C., O'Toole T., O'Toole T., Saunders J., Shorter G, Smyth B., Kaner E., Cullen W., Feasibility of alcohol screening among patients receiving opioid treatment in primary care, BMC Family Practice, 17, (1), 2016, p1-10 Journal Article, 2016 DOI

Ivers JH, Fitzgerald J, Whelan C, Sweeney B, Keenan E, Fagan AJ, Progressive white matter impairment as a predictor of outcome in a cohort of opioid-dependent patient's post-detoxification, Addiction Biology, 2016 Journal Article, 2016 DOI

Darker, C.D., Sweeney, B., Keenan, E., Whiston, L., Anderson, R., Barry, J., Screening and Brief Interventions for Illicit Drug Use and Alcohol Use in Methadone Maintained Opiate-Dependent Patients: Results of a Pilot Cluster Randomized Controlled Trial Feasibility Study, Substance Use and Misuse, 51, (9), 2016, p1104-1115 Journal Article, 2016 DOI

Marie Lynch, Zorina Gibbons, Eamon Keenan, Anitcoagulant Prescribing and Monitoring at the National Drug Treatment Centre, International Conference of the College of Psychiatrists of Ireland & the Royal College of Psychiatrists in Northern Ireland, Slieve Russell Hotel, Cavan, 10th-11th November, edited by College of Psychiatrists, Ireland , 2016 Poster, 2016 URL

Kinahan JC, Surah S, Keating S, Bergin C, Mulcahy F, Lyons F, Keenan E, Effect of integrating HIV and addiction care for non-engaging HIV-infected opiate-dependent patients., Irish Journal of Medical Science, 2015 Journal Article, 2015 DOI

Truszkowska, E., McCarron, P., Konovalov, P., Galander, T., Lyons, S., Keenan, E., Smyth, B.P., Case-control study of risks and causes of death amongst opioid dependent patients on methadone maintenance treatment, Canadian Journal of Addiction, 6, (3), 2015, p18-26 Journal Article, 2015

Klimas J, Marie Henihan A, McCombe G, Swan D, Anderson R, Bury G, Dunne C, Keenan E, Saunders J, Shorter GW, Smyth BP, Cullen W, Psychosocial Interventions for Problem Alcohol Use in Primary Care Settings (PINTA): Baseline Feasibility Data., Journal of dual diagnosis, 11, (2), 2015, p97-106 Journal Article, 2015 DOI

Giese C, Igoe D, Gibbons Z, Hurley C, Stokes S, McNamara S, Ennis O, O'Donnell K, Keenan E, De Gascun C, Lyons F, Ward M, Danis K, Glynn R, Waters A, outbreak control team, Injection of new psychoactive substance snow blow associated with recently acquired HIV infections among homeless people who inject drugs in Dublin, Ireland, 2015., Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2015 Journal Article, 2015 DOI

McLaughlin, J., Surah, S., Synnott, C., Adams, R., Walsh, C., O'Dea, S., Noone, S., Keenan, E., Keating, S., Barry, M., Bergin, C., Mulcahy, F., Lyons, F., Health-related quality of life of patients on opiate replacement therapy, Heroin Addiction and Related Clinical Problems, 16, (4), 2014, p25-32 Journal Article, 2014

Gilroy, D., O'Brien, S., Barry, J., Ivers, J., Whiston, L., Keenan, E., & Darker, C. , Benzodiazepine use in a methadone maintained opioid dependent cohort in Ireland. , Heroin Addiction & Related Clinical Problems, , 14, (3), 2014, p101 - 110 Journal Article, 2014

Surah S, Adams R, Townsend L, Reynolds I, Kinahan JC, Keating S, Mulcahy F, Keenan E, Barry M, Lyons F, Health-related quality of life of HIV-infected intravenous drug users., International journal of STD & AIDS, 2013 Journal Article, 2013 DOI

Leahy D, Schaffalitzky E, Armstrong C, Bury G, Cussen-Murphy P, Davis R, Dooley B, Gavin B, Keane R, Keenan E, Latham L, Meagher D, McGorry P, McNicholas F, O'Connor R, O'Dea E, O'Keane V, O'Toole TP, Reilly E, Ryan P, Sanci L, Smyth BP, Cullen W, Primary care and youth mental health in Ireland: qualitative study in deprived urban areas., BMC family practice, 14, 2013, p194 Journal Article, 2013 TARA - Full Text DOI

Field CA, Klimas J, Barry J, Bury G, Keenan E, Smyth BP, Cullen W, Problem alcohol use among problem drug users in primary care: a qualitative study of what patients think about screening and treatment , BMC Family Practice, 14, (1), 2013, p98- Journal Article, 2013 TARA - Full Text URL

Surah S, Kieran J, O'Dea S, Shiel C, Raffee S, Mulcahy F, Keenan E, Lyons F, Use of the Alcohol Use Disorders Identification Test (AUDIT) to determine the prevalence of alcohol misuse among HIV-infected individuals., International Journal of STD & AIDS, 24, (7), 2013, p517-21 Journal Article, 2013 DOI

Klimas J, Anderson R, Bourke M, Bury G, Field CA, Kaner E, Keane R, Keenan E, Meagher D, Murphy B, O'Gorman CS, O'Toole TP, Saunders J, Smyth BP, Dunne C, Cullen W, Psychosocial interventions for alcohol use among problem drug users: protocol for a feasibility study in primary care., JMIR research protocols, 2, (2), 2013, pe26 Journal Article, 2013

Roy A, McCarthy C, Kiernan G, McCorrigan C, Keenan E, Mahon N, Sweeney B, Increased incidence of QT interval prolongation in a population receiving lower doses of methadone maintenance therapy, Addiction, 107, (6), 2012, p1132 - 1139 Journal Article, 2012 DOI

Mullen L, Barry J, Long J, Keenan E, Mulholland D, Grogan L, Delargy , A National study of the retention of Irish opiate users in methadone substitution treatment., American Journal of Drug and Alcohol Abuse, 38, (6), 2012, p551 - 558 Journal Article, 2012 DOI

Field CA, Klimas J, Barry J, Bury G, Keenan E, Lyons S, Smyth BP, Cullen W, Alcohol screening and brief intervention among drug users in primary care: a discussion paper., Irish journal of medical science, 2011 Journal Article, 2011 DOI

Jan Klimas, Catherine Anne Field, Joe Barry, Gerard Bury, Eamon Keenan, Suzi Lyons, Bobby Smyth, Walter Cullen, Commentary on 'The research translation problem: Alcohol screening and brief intervention in primary care - real world evidence supports theory', Drugs: education, prevention and policy, Online, 2011, p1 - 3 Journal Article, 2011 DOI

Somers CJ, Bridgeman J, Keenan E, Nasal carriage prevalence of meticillin resistant (MRSA) and meticillin Sensitive (MSSA) staphylococcus aureus for subjects attending a Dublin Methadone clinic, Journal of Infection, 60, (6), 2010, p494 - 496 Journal Article, 2010 DOI

Smyth BP, Barry J, Keenan E, Ducray K, Lapse and relapse following inpatient treatment of opiate dependence., Irish medical journal, 103, (6), 2010, p176-9 Journal Article, 2010 URL

Mullen L, Keenan E, Barry J, Long J, Mulholland D, Grogan L, Delargy I., Factors predicting completion in a cohort of opiate users entering a detoxification programme., Irish Journal of Medical Science, 179, 2010, p569 - 573 Journal Article, 2010 DOI

Hussey, D., McCarthy, C., Keenan, E., Methadone and its effect on QTc prolongation, Irish Journal of Psychological Medicine, 26, (1), 2009, p43-44 Journal Article, 2009 DOI

Ryder N, Cullen W, Barry J, Bury G, Keenan E, Smyth BP, Prevalence of problem alcohol use among patients attending primary care for methadone treatment., BMC Family Practice, 10, (42), 2009 Journal Article, 2009 URL DOI TARA - Full Text

Anita Ambreen Taj, Eamon Keenan, Patricia Casey, Childhood adversity and substance misuse, Ir. j. psychol. Med., 25, (01), 2008, p29--30 Journal Article, 2008 DOI

Fagan, J., Keenan, E., Neonatal outcome following buprenorphine maintenance for opiate dependency, Irish Journal of Psychological Medicine, 25, (4), 2008, p141-144 Journal Article, 2008 DOI

HIV/AIDS treatment and care for Injecting Drug Users: in, editor(s)Edited by Irina Eramova, Srdan Matic and Monique Munz , HIV/AIDS treatment and care. Clinical protocols for the WHO European Region, Copenhagen (WHO Regional Office), WHO Regional Office for Europe Publishing, 2007, pp163 - 229, [E Keenan, A Verster, M Donoghue] Book Chapter, 2007 URL

Long J, Keenan E, Grogan L, Mullen L, Barry J, Sinclair H, HIV infection among heroin users and area of residence, Irish Medical Journal, 99, (8), 2006, p230 - 233 Journal Article, 2006 URL

Murray-Lillibridge K, Barry J, Reagan S, O'flanagan D, Sayers G, Bergin C, Keenan E, O'briain S, Plunkett P, McMahon G, Keane C, O'sullivan P, Igoe D, Mullen L, Ward M, Smith A, Fischer M, Epidemiological findings and medical, legal, and public health challenges of an investigation of severe soft tissue infections and deaths among injecting drug users -- Ireland, 2000., Epidemiology and infection, 134, (4), 2006, p894-901 Journal Article, 2006 DOI

Keenan, E., Irish addiction services - Past, present and future, Irish Journal of Psychological Medicine, 22, (4), 2005, p118-120 Journal Article, 2005 DOI

Grogan L, Tiernan M, Geogeghan N, Smyth B, Keenan E, Bloodborne virus infections among drug users in Ireland: a retrospective cross-sectional survey of screening, prevalence, incidence and hepatitis B immunisation uptake, Irish Journal of Medical Science, 174, (2), 2005, p14 - 20 Journal Article, 2005 DOI

Smyth B, Barry J, Keenan E, Irish injecting drug users and hepatitis C: the importance of the social context of injecting, International Journal of Epidemiology, 34, 2005, p166 - 172 Journal Article, 2005 URL DOI

Keating, S., Coughlan, S., Connell, J., Sweeney, B., Keenan, E., Hepatitis C viral clearance in an intravenous drug-using cohort in the Dublin area, Irish Journal of Medical Science, 174, (1), 2005, p37-41 Journal Article, 2005 DOI

M Scully, E Keenan, Better drug treatment infrastructure needed, British Medical Journal, 331, 2005, p1352- Journal Article, 2005

Mike Scully, Noreen Geoghegan, Paul Corcoran, Marika Tiernan, Eamon Keenan, Specialized drug liaison midwife services for pregnant opioid dependent women in Dublin, Ireland, Journal of Substance Abuse Treatment, 26, (1), 2004, p27--33 Journal Article, 2004 DOI

O'Shea, J., Keenan, E., Highly active antiretroviral therapy among HIV-infected people with alcohol and substance misuse problems: The impact of substance abuse treatment [3], Addiction, 99, (8), 2004, p1064-1065 Journal Article, 2004 DOI

W Flannery, E Keenan, Report on Benzodiazepines in the Republic of Ireland with a view to legislative change, British Medical Journal, 318, 2003, p1503- Journal Article, 2003 DOI

Cahill R, Keenan E, Clarke A, Boland M, Barry J, Consequences of legislative changes to methadone prescribing in Ireland, International Journal of Drug Policy, 14, 2003, p241 - 245 Journal Article, 2003

Smyth BP, O'Connor JJ, Barry J, Keenan E, Retrospective cohort study examining incidence of HIV and hepatitis C infection among injecting drug users in Dublin, Journal of Epidemiology and Community Health, 57, 2003, p310 - 311 Journal Article, 2003 DOI

Clarke S, Keenan E, Ryan M, Barry M, Mulcahy F, Directly observed antiretroviral therapy for injection drug users with HIV infection., The AIDS reader, 12, (7), 2002, p305-7, 312-6 Journal Article, 2002

Mullen L, Barry J, Igoe D, Keenan E, Ward M, Murray K, Unexplained illness among injecting drug users in Dublin: a case-control study, Journal of Epidemiology and Community Health, 56, 2002, p575 - 576 Journal Article, 2002 DOI

Smyth B, Barry J, Keenan E, Syringe borrowing persists in Dublin despite harm reduction interventions, Addiction, 96, 2001, p717 - 727 Journal Article, 2001 URL URL DOI

Gervin, M., Hughes, R., Bamford, L., Smyth, B.P., Keenan, E., Heroin smoking by 'chasing the dragon' in young opiate users in Ireland: Stability and associations with use to 'come down' off 'Ecstasy', Journal of substance abuse treatment , 20, (4), 2001, p297-300 Journal Article, 2001 DOI

Mike Scully, Noreen Geoghegan, Eamon Keenan, Drug liason midwives, Addiction, 96, (4), 2001, p651--652 Journal Article, 2001 DOI

Clarke S, Keenan E, Bergin C, Lyons F, Hopkins S, Mulcahy F, The changing epidemiology of HIV infection in injecting drug users in Dublin, Ireland., HIV medicine, 2, (4), 2001, p236-40 Journal Article, 2001

Smyth BP, Keenan E, O'Connor JJ, Assessment of hepatitis C infection in injecting drug users attending an addiction treatment clinic., Irish journal of medical science, 169, (2), 2000, p129-32 Journal Article, 2000

Smyth, B.P., Keenan, E., O'Connor, J.J., Evaluation of the impact of Dublin's expanded harm reduction programme on prevalence of hepatitis C among short-term injecting drug users, Journal of Epidemiology & Community Health, 53, (7), 1999, p434-435 Journal Article, 1999

Keenan, E., Barry, J., Van Teijlingen, E., Ryan, M., Matheson, C., Bond, C., Managing drug misuse in general practice (multiple letters) [3], British Medical Journal, 319, (7223), 1999 Journal Article, 1999 DOI

Gervin M., Smyth R., Bamford L., Keenan E, Chasing the dragon: experience in Ireland and associations with 'Ecstasy', Addiction, 93, (4), 1998, p601 - 603 Journal Article, 1998 DOI

Smyth BP, Keenan E, O'Connor JJ, Bloodborne viral infection in Irish injecting drug users., Addiction, 93, 1998, p1649 - 1656 Journal Article, 1998 URL URL DOI

Keenan E., O'Donnell C., Sinanan K., O'Callaghan E, Severity of Alcohol Dependence and its Relationship to Neurological Soft signs, Neuropsychological Impairment and Family History, Acta Psychiatrica Scandinavica, 95, (4), 1997, p272 - 276 Journal Article, 1997 DOI

Bosio, P., Keenan, E., Gleeson, E., Dorman, A., Clarke, T., Darling, M., O'Connor, J., The prevalence of chemical substance and alcohol abuse in an obstetric population in Dublin, Irish Medical Journal, 90, (4), 1997, p149-150 Journal Article, 1997 URL

Dorman A., Keenan E., Schuttler C., Merry J., O'Connor J.J., HIV Risk Behaviour in Irish Intravenous Drug User , Irish Journal of Medical Science, 166, (4), 1997, p235 - 238 Journal Article, 1997 DOI

Taj, R., Keenan, E., O'Connor, J.J., A review of patients on methadone maintenance., Irish medical journal, 88, (6), 1995, p218-219 Journal Article, 1995 URL

Smyth B., Keenan E., Dorman A., O'Connor J.J., HCV Infection among IDU's attending the National Drug Treatment Centre, Irish Journal of Medical Science, 164, (4), 1995, p267 - 268 Journal Article, 1995 DOI

Smyth, R., Keenan, E., Dorman, A., O'Connor, J., Hepatitis C infection among injecting drug users attending the National Drug Treatment Centre, Irish Journal of Medical Science, 164, (4), 1995, p267-268 Journal Article, 1995

Hutchinson, L., Keenan, E., Cheasty, M., O'Connor, J.J., McCarthy, G., A comparison of attendance for drug misuse to Dublin accident & emergency departments 1985-1993., Irish Medical Journal, 88, (2), 1995, p56-57 Journal Article, 1995 URL

Smyth, B., Keenan, E., Dorman, A., O'Connor, J.J., Gender differences in needle sharing behaviour patterns [2], Addiction, 89, (1), 1994, p96-97 Journal Article, 1994 DOI

Keenan E, Keane V, Ramsey L, Fragile X Syndrome - A Review, Irish Medical Journal, 86, (3), 1993, p92 - 96 Journal Article, 1993 URL

Keenan, E., Dorman, A., O'Connor, J., Six year follow up of forty five pregnant opiate addicts, Irish Journal of Medical Science, 162, (7), 1993, p252-255 Journal Article, 1993 DOI

Keenan E., Dorman A., O'Connor J.J, Pregnant Opiate Addicts (letter), Irish Journal of Medical Science, 162, (10), 1993, p444 - 444 Journal Article, 1993

Keenan, E., Gervin, M., Dorman, A., Psychosis and recreational use of MDMA ("Ecstasy", Irish Journal of Psychological Medicine, 10, (3), 1993, p162-163 Journal Article, 1993

Keenan E., Ramsey L., A Study of Violent Behaviour by Residents in a Mental Handicap Centre, Irish Journal of Psychological Medicine, 10, (1), 1993, p48 - 51 Journal Article, 1993

Non-Peer-Reviewed Publications

Eamon Keenan, HSE Perspective on Drug Use in Ireland, Citizens Assembly on Drug Use, The Grand Hotel, Malahide, Dublin, 16th April, 2023, Government of Ireland Invited Talk, 2023

Eamon Keenan, HSE Clinical Programme on Dual Diagnosis in Changing Drugs Landscape - Everywhere, Everything, Everyone, Launch of Clinical Programme on Dual Diagnosis, Morrison's Hotel, Dublin, 23rd May, 2023, HSE Mental Health Division Invited Talk, 2023

Eamon Keenan, Irish Drug Context & Clinical Implications, EU Pompidou Group, Executive Training 2022, Trinity College Dublin, 21st June , 2022, Council of Europe Invited Talk, 2022

Nicki Killeen, Sinead McNamara, Siobhan Stokes, Eamon Keenan, Safer Nightlife Programme 2022, HSE, Ireland, November, 2022 Report, 2022

Eamon Keenan, Emerging Drug Trends and their impact on Mental Health Comorbidities, Dr Michal Kelleher Memorial Lecture, Virtual webinar, 14th October, 2022, National Suicide Research Foundation Invited Talk, 2022

Eamon Keenan, Irelands Experience & Progression on the Provision of Naloxone, 65th Commission on Narcotic Drugs organised by the Netherlands - Side event on Prevention of Overdoses and Drug Related Deaths, Netherlands (Virtual), 15th March , 2022, UNODC Invited Talk, 2022

Sinead McNamara, Nicki Killeen, Siobhan Stokes, Eamon Keenan, Irish Syringe Analysis Pilot Project, HSE, Ireland, September, 2022 Report, 2022

Evans, David, Bingham Tim, Hamza, Sarah and Keenan, Eamon, Naloxone Administration by Addiction and Homeless Service Providers in Ireland: 2018-2020, Drug Insights Report, 2, HSE, Ireland, June, 2022 Report, 2022

David Evans, Eamon Keenan, Nicki Killeen, DRUG-RELATED DEATHS IN IRELAND: KEY PATTERNS AND TRENDS 2008-2017, National Social Inclusion Office, HSE, Ireland, August, 2021 Report, 2021

Eamon Keenan, Nicki Killeen and Emerging Trends and Drug Checking Working Group, Report of the Emerging Drug Trends and Drug Checking Working Group 2021, HSE, Ireland, September, 2021 Report, 2021

Eamon Keenan, Prevention of Overdoses and Drug Related Deaths in Ireland & Implementation of EU Drug Strategy and Action Plan, Horizontal Drugs Group Thematic Discussion on Preventation of Overdoses and Drug Related Deaths, Virtual, Slovenia hosting, 6th October, 2021, Council of Europe Invited Talk, 2021

Eamon Keenan, Drug Market and Covid 19, Irish Institute of Pharmacists Webinar Series, Virtual, 3rd June, 2020, Irish Institute of Pharmacists Invited Talk, 2020

Eamon Keenan, Cocaine Challenges and Trends in Ireland, EMCDDA Management Board Meeting, Lisbon, Portugal, 10/12/19, 2019, EMCDDA Invited Talk, 2019

Eamon Keenan, Emerging Strategies/Trends for Addiction Services, 46th Annual Coombe Hospital Guinness Symposium, Coombe Hospital, Dublin, 19th October, 2018, Coombe Hospital Invited Talk, 2018

Eamon Keenan, 'Mental health and Substance Misuse - The emergence of a Clinical Programme' Keynote Speaker, European Federation of Therapeutic Communities Conference, Dublin Castle, 21st-22nd September, 2017, Coolmine Therapeutic Community and DoH Invited Talk, 2017

Eamon Keenan, 'Changes - Drug Trends and Drug Laws', International Conference of the College of Psychiatrists of Ireland and the Royal College of Psychiatrists in Northern Ireland, Cavan, 10th-11th November, 2016, College of Psychiatrists ireland Invited Talk, 2016

E Truszkowska, E Keenan, Alcohol Use Disorder: an overview, Modern Medicine, (1), 2014, p19 - 24 Journal Article, 2014

Eamon Keenan, Homeless and Addiction Responses, Homelessness and Mental Health: What can be done?, Clarion Hotel, IFSC, Dublin, 12th Otober, 2012, College of Psychiatrists ireland Invited Talk, 2012

Carmody D, Geoghegan N, Sheppard R, Scully M, Keenan E O'Connell M, Drug use in Pregnancy: challenges for health care workers, MIDIRS Midwifery Digest, 20, (4), 2010, p447 - 450 Journal Article, 2010

S Maloney, Keenan E, N Geoghegan, What are the risk factors for soft tissue abscess development among injecting drug users, Nursing Times, 106, (23), 2010, p21 - 24 Journal Article, 2010

A Afridi, E Keenan, Substance Abuse: the road to mental health problems, Forum. Clinical Focus, 9, (2), 2009, p16 - 18 Journal Article, 2009

Taj A, Keenan E, Casey P, Consumer satisfaction with methadone maintenance programmes survey, Irish Psychiatrist, 9, (2), 2008, p91 - 93 Journal Article, 2008

J Long, E Keenan, The evidence base for treatment of problem cocaine use, Drugnet Ireland, (21), 2007, p16 - 18 Journal Article, 2007

J O'Shea, E Keenan, Harm reduction initiatives for drug users and the general population: what value to society?, Irish Psychiatrist, 5, (5), 2004, p109 - 110 Journal Article, 2004

K Kernan, E Keenan, Ecstasy abuse: an Irish perspective, Irish Psychiatrist, 5, (5), 2004, p191 - 194 Journal Article, 2004

E Keenan, C Fitzpatrick, Review of Addiction Services in Midland Health Board, MHB, 2003 Report, 2003

N Garvey, E Keenan, Excessive drinking: How much is too much?, Modern Medicine, 32, (11), 2002, p35 - 43 Journal Article, 2002

M Scully, E Keenan, Treatment of Opioid Dependence, Irish Psychiatrist, 3, (2), 2002, p69 - 74 Journal Article, 2002

Council of Europe Publishing, Contribution to the Sensible Use of Benzodiazepines, Drugs and Addiction, Strasbourg, Council of Europe, Council of Europe, October, 2001, p53 - 63 Report, 2001

Irish Psychiatrist, Dublin, First Medical, [eds.], 2000-2011 Editorial Board, 2000

R. Cahill, I. O'Neill, T. Barnett, C. Fogarty, R. McDermott, E. Keenan, Substance Use in School Going Teenagers in Co. Kildare and West Wicklow, EHB, 1999 Report, 1999

Keenan E, Treatment Challenges in Adolescent Drug Users, Journal of Health Gain , 3, (3), 1999, p3 - 6 Journal Article, 1999

Research Expertise


  • Title
    • Prescription drugs with potential for misuse: A multi-indicator analysis of supply, patterns of use and the associated health burden in Ireland over the past ten years
  • Summary
    • Prescription drugs are often strong medications, which is why they require a prescription and are not available over the counter. There is increasing concern about the misuse of certain prescription drugs, for example opioids (prescribed for pain relief), and benzodiazepines, a group of medicines often used in the shortterm to treat anxiety or sleeping problems. Misuse of prescription drugs generally refers to taking a prescribed drug in a way other than how it was prescribed, for example taking someone else's medication or taking more than the prescribed dose to create a feeling of euphoria or to get "high". It also refers to taking illegally sourced prescription drugs, which is high risk as the drugs may be fake and/or contain harmful substances. The Health Research Board and the Department of Health in Ireland have identified the misuse of prescription drugs as a research priority in Ireland. As there is no single source of information that fully describes the situation in Ireland, we are proposing to examine many different Irish data sources to provide a detailed analysis of the supply, patterns of use and harms associated with prescription drugs with potential for misuse (PDPM).
  • Funding Agency
    • HRB SDAP
  • Date From
    • 20/12/21
  • Date To
    • 31/12/23
  • Title
    • Exploring the risk factors and consequences of cannabis use in adolescence using population-based data: the "CANNARISK" study
  • Summary
    • Over the past decade there has been an increase in the number of adolescents using cannabis worldwide. This is concerning because cannabis is increasing in strength with more serious long term effects on health such as psychosis and depression. The adverse effects of using cannabis are particularly pronounced in those who start to use cannabis in adolescence. However despite the evidence for harmful effects, young people are less likely likely to view cannabis as a harmful substance. In this project we aim to investigate two key issues in relation to cannabis use in youth. Firstly we will examine what factors increase the chances of a young person beginning to use cannabis. We will also examine what factors influence a young person not to use cannabis. Secondly we will investigate what effect early use of cannabis has on the structure of the brain and on cognition.
  • Funding Agency
    • HRB
  • Date From
    • 01/10/22
  • Date To
    • 30/09/26
  • Title
    • Sustaining increased and improved access to opioid substitution treatment (OST) in Ireland: a mixed-methods study to evaluate the impact of national contingency OST guidelines on process and client outcomes, and identify quality indicators for the continued and safe delivery of OST throughout and beyond COVID-19.
  • Summary
    • While opioid substitution treatment (OST) is the most effective treatment for opioid dependence, it is heavily dependent on regular face-to-face health care delivery placing both clients and treatment providers at risk of COVID-19. Policies were rapidly changed with the introduction of Page 18 of 44 national contingency guidelines by the HSE National Social Inclusion Office, where Addiction services are coordinated, beginning in March 2020 to ensure rapid and uninterrupted access to OST while balancing efforts to mitigate COVID-19 risk. The Programme for Government 2020 states they will retain many of the measures introduced during COVID-19 to reduce waiting times in accessing treatment services and reduce overdose mortality. It is therefore essential to examine the impacts, benefits and unintended consequences of the special measures introduced during COVID-19 at a national level, thus informing which measures can and should be sustained throughout and beyond COVID-19 to support effective, safe and patient-centred care promoting the health and welling being of all people with opioid dependence. The aim of this project is to evaluate the impact of the national contingency guidelines, developed in response to COVID-19, on the quality of OST care delivered in Ireland, and to identify priorities for quality and safety improvements which will inform clinical decision making throughout and beyond the pandemic. This will be achieved through evaluating the impact of contingency guidelines on numbers entering OST, numbers on waiting list, waiting times, patient dropout and mortality using an interrupted time series analysis of data from the national OST treatment register (Central Treatment List) from June 2019 to December 2020, alongside a Delphi consensus study of quality indicators for the safe delivery of OST in Ireland throughout and beyond COVID-19. Evidence generated from these studies will inform national policy decisions in relation to improving quality of care in OST.This offers a real opportunity for changes identified within the research and recommendations arising from the research to be translated into meaningful actions for Addiction services in Ireland and possibly Europe in the coming years.
  • Funding Agency
    • RCQPS
  • Date From
    • Nov 2020
  • Date To
    • Nov 2021
  • Title
    • Methadone substitution treatment: mortality and progression pathways
  • Summary
    • Despite evidence supporting methadone substitution treatment (MST), methadone itself has been associated with drug-related deaths. A recent external review of methadone services in Ireland concluded that Ireland is currently lacking a systematic approach of data linkage which is essential to determine the quality of care delivered to drug users in treatment, particularly in relation to mortality. The National Drug Strategy 2009-2016 also concluded that clinical research is underdeveloped. Understanding progression pathways in treatment and qualitative research regarding service users' experiences were identified as research priorities. The proposed study aims to inform evidence-based treatment guidelines to reduce the risk of mortality associated with MST and to provide a better understanding of progression pathways within the addiction services. Using a sequential mixed methods study design, the project will involve a record linkage cohort study of approximately 3,000 patients attending specialist addiction outpatient services in Dublin South West between 2010 and 2015. The primary objectives of this cohort study are: (1) to investigate the extent to which the impact of MST on mortality (all cause and drug-related) is influenced by modifiable treatment related factors such as treatment modality, dose, treatment duration, co-prescriptions including benzodiazepines and dispensing arrangements including supervised methadone consumption; (2) to identify determinants of time to progression to treatment in primary care or detoxification; and (3) determinants of time to discontinuation in MST. This will be combined with in-depth qualitative interviews with 40 drug users in relation to their treatment pathways or journey to-date, experiences of non-fatal overdose, poly-drug use and supervised methadone consumption. Evidence generated from this study will inform both national and international policy decisions in relation to improving quality of care in MST and reducing mortality. This study will also inform evidence based initiatives around progression pathways, taking the service users perspective into account. The overall aim of this project is to generate evidence based standards for the quality of clinical care in methadone substitution treatment (MST) in addiction services, which will inform future policy decisions on initiatives to reduce the risk of mortality associated with MST and to provide a better understanding of progression pathways within the addiction services. This will be achieved through a sequential mixed method study design which will involve a record-linkage study of approximately 3,000 patients attending specialist addiction outpatient services in Dublin South West, followed by a qualitative study of drug users' experiences of treatment and non-fatal overdose.
  • Funding Agency
    • HRB
  • Date From
    • 15/05/17
  • Date To
    • 14/05/21
  • Title
    • Peer Led Addiction Recovery (Predictor) Programme
  • Summary
    • Recovery coaching is an innovative psychosocial form of strengths-based support for individuals in addiction. Recovery Coaches are experts-by-experience. They support any positive change, helping individuals as they enter and exit treatment to avoid relapse, build community support, formulate goals regarding work, enter education, and build and sustain relationships (i.e. developing recovery capital). There is an emerging body of research primarily in Australia, the US and the UK showing support for recovery coaching. While the role of the Recovery Coach is relatively new in addiction recovery, peer support has been hugely successful in the mental health field and, more recently, homeless services. Developing an intervention that will assist individuals to build resources and reduce the potential for relapse will be hugely beneficial at an individual, community and health service.
  • Funding Agency
    • Cork Local Drug and Alcohol Task Force
  • Date From
    • November 2020
  • Date To
    • Delayed due to Covid



National Clinical Lead for HSE Addiction Services. Views sought and asked to comment publicly on a range of issues associated with drug and alcohol use in Ireland. Regular advice to Government and responding to Parliamentary Questions and Representations for the Minister on drug related issues 2016

Management Board, European Centre for Drugs and Drug Addiction (EMCDDA) determining policy and direction for drug services in Europe through advice to European Commission 2019

Irish representative on EU National Drug Coordinators Group to disseminate knowledge and best practice within member EU states 2019

HSE representativbe on the Ministerial Rapid Response Group on Drug Use in Higher Education Institutions 2019

HSE Representative on the National Oversight Committee for National Drug and Alcohol Strategy 2017

Member of Health Committee of Irish Medical Council Provides support to Doctors experiencing Health difficulties 2013

HSE Primary Care representative on Cross Departmental National Steering Group for 'Connecting for Life', Ireland's National strategy to reduce suicide and self harm in society 2016

HSE representative on High Level Task Force on mental health and addiction challenges of persons interacting with the criminal justice sector 2021

Medical Council Stakeholder Group on overprescribing of Benzodiazepines and other Drugs Will inform and influence National Policy 2019

Member of Project Team on Drug Use in Higher Education in Ireland (DUHEI) survey project 2019

Member of HSE Hepatitis C Programme Advisory Group providing roll out of HCV vaccination programme to vulnerable groups in society 2016

Chair of Emerging Drug Trends Working Group convened to progress Specific actions within the National Drug and Alcohol Strategy 2019

Chair of Registration Committee of College of Psychiatrists of Ireland 2014

Member of College of Psychiatrists Council Sub Committee on Policy and Strategy. Rep from Addiction Faculty 2021

Chair of HSE Working Group to advise on establishment of Medically Supervised Injection Facility. Included Service User Representation 2016

Chair of Irish Psychiatric Training Committee (Eastern Region) 2004

Chair of Treatment/Rehabilitation Committee of the National Advisory Committee on Drugs (NACD) Involved commissioning of research including ROSIE study 2004

Member of the Forum of Irish Postgraduate Medical Training Bodies - College of Psychiatrists Representative 2014

Awards and Honours

Senior Registrar Prize in Psychiatry, RAMI 1994

Poster Prize winner at 2019 College of Psychiatrists Spring Conference 2019

Poster Prize winner 2018 Royal College Psychiatry, Faculty of Addictions Annual Conference 2018


Member of College of Psychiatrists of Ireland 2008

Member of Royal College of Psychiatrists 1991 – 2008