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2.

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3.

[Article] Rock, Kirsten L and Treble, Ric and Copeland, Caroline S (2026) Legislating novel psychoactive substances: lessons from 15 years of UK mortality data (2007-2022). Frontiers in Pharmacology, 16. https://doi.org/10.3389/fphar.2025.1708335

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[Article] Sommer, Michaela J and Grafinger, Katharina Elisabeth and Hermanns-Clausen, Maren and Auwärter, Volker (2025) Development of a novel risk score reflecting the relative harm potential of synthetic cannabinoids based on prevalence estimates, well-documented intoxication cases and basic pharmacological data. Addiction, Early online. https://doi.org/10.1111/add.70268

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[Report] Advisory Council on the Misuse of Drugs. (2025) Advisory Council on the Misuse of Drugs annual report (January 2023 to December 2025 consolidated). London: Advisory Council on the Misuse of Drugs.

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[Report] House of Commons Justice Committee. (2025) Tackling the drugs crisis in our prisons. London: House of Commons.

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[Video] HSE Health and Wellbeing. (2025) Parents matter – vaping products & psychoactive substances: what you should know as a parent. Health Service Executive.

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[Dail Debates] [Oireachtas] Dáil Éireann Debate. Question 1157 - Substance misuse [47833/25]. (17 Sep 2025)

13.

[News] [RTE News] , Byrne, Claire and Keenan, Eamon HSE lead on addiction Professor Eamon Kennan. (10 Sep 2025)

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[Report] Chou, Roger and Ahmed, Azrah Y and Bougatsos, Christina and Morasco, Benjamin J and Dana, Tracy and Fu, Rongwei (2025) Living systematic review on cannabis and other plant-based treatments for chronic pain. Rockville, MD: Agency for Healthcare Research and Quality.

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[FactSheet] Ireland. Department of Health. (2025) HHC (Hexahydrocannabinol). Dublin: Department of Health.

16.

[News] Ireland. Department of Health. [Department of Health] Ministers for Health announce that HHC is now classified as an illegal drug. (29 Jul 2025)

17.

[Dail Debates] [Oireachtas] Dáil Éireann debate. Question 2604 – Departmental regulations [THC products] [41090/25]. (29 Jul 2025)

18.

[Dail Debates] [Oireachtas] Dáil Éireann debate. Question 2678 – Medicinal products [HHC] [41325/25]. (29 Jul 2025)

19.

[Dail Debates] [Oireachtas] Dáil Éireann debate. Question 2716 – Legislative measures [HHC] [41666/25]. (29 Jul 2025)

20.

[Dail Debates] [Oireachtas] Dáil Éireann debate. Question 2717 – Legislative measures [cannabinoids] [41667/25]. (29 Jul 2025)

21.

[Dail Debates] [Oireachtas] Dáil Éireann debate. Question 2728 – Misuse of drugs [HHC] [41719/25]. (29 Jul 2025)

22.

[News] [thejournal.ie] , Sherlock, Marie Time to face the reality of synthetic drug use among young people. (26 Jul 2025)

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[Article] Duddy, Claire (2025) What are synthetic drugs? House of Commons Library Insight,

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[Article] O'Mahony, Brian and Lanigan, Sarah and Lally, Níall and O'Malley, Andrew and Smyth, Bobby and McDonald, Colm and Hallahan, Brian (2025) Novel substance, same old problems: admissions of psychosis precipitated by hexahydrocannabinol, a widely available semi-synthetic cannabinoid. BJPsych Bulletin, pp. 1-6. 10.1192/bjb.2025.85

25.

[Dail Debates] [Oireachtas] Dáil Éireann debate. Question 336 – Healthcare policy [Vapes, pouches, HHC] [38401/25]. (10 Jul 2025)

26.

[Dail Debates] [Oireachtas] Dáil Éireann debate. Question 859 – Misuse of drugs [HHC] [37721/25]. (08 Jul 2025)

27.

[Webpage] Center for Forensic Science Research and Education. (2025) CSFRE new psychoactive substances (NPS). Scope recommendations. URL: https://www.cfsre.org/nps-discovery/scope-recommen...

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[Report] Western Region Drug and Alcohol Task Force, Planet Youth. (2025) Growing up in the west: Planet Youth report 2025: County Mayo. Galway: Western Region Drug and Alcohol Task Force.

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[Report] Western Region Drug and Alcohol Task Force, Planet Youth. (2025) Growing up in the west: Planet Youth report 2025: County Roscommon. Galway: Western Region Drug and Alcohol Task Force.

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[Report] Western Region Drug and Alcohol Task Force, Planet Youth. (2025) Growing up in the west: Planet Youth report 2025: Galway city. Galway: Western Region Drug and Alcohol Task Force.

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[Report] Western Region Drug and Alcohol Task Force, Planet Youth. (2025) Growing up in the west: Planet Youth report 2025: Galway county. Galway: Western Region Drug and Alcohol Task Force.

32.

[News] [RTE News] , Kenny, Aisling 169 young people sought treatment for HHC drug in last 18 months - Health Research Board. (30 Jun 2025)

33.

[News] [Limerick Post] , English, Bernie Limerick teens sent to psych wards after using legal vape substance. (26 Jun 2025)

34.

[Dail Debates] [Oireachtas] Dáil Éireann debate. Question 1585, 1614, 1615 – Healthcare policy [HHC] [30333/25, 30523/25, 30524/25]. (10 Jun 2025)

35.

[Report] European Union Drugs Agency. (2025) Drug-induced deaths – the current situation in Europe (European Drug Report 2025). Lisbon: EUDA.

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[Report] European Union Drugs Agency. (2025) Harm reduction – the current situation in Europe (European Drug Report 2025). Lisbon: EUDA.

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[Report] European Union Drugs Agency. (2025) New psychoactive substances – the current situation in Europe (European Drug Report 2025). Lisbon: EUDA.

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[Report] European Union Drugs Agency. (2025) Understanding Europe’s drug situation in 2024 – key developments (European Drug Report 2025). Lisbon: EUDA.

39.

[Dail Debates] [Oireachtas] Dáil Éireann Debate. Question 584 – Tobacco control measures [HHC vapes] [26759/25]. (27 May 2025)

40.

[News] [Irish Examiner] , Murphy, Ann HHC: The drug sold on Irish main streets that’s sending teens to hospital. (17 May 2025)