Fleming, Glenda F and McElnay, James C and Hughes, Carmel M (2003) The separation of codeine from nonprescription combination analgesic products. Substance Use & Misuse, 38, (9), pp. 1217-1226. https://doi.org/10.1081/ja-120018480.

Fleming, Glenda F and McElnay, James C and Hughes, Carmel M and Sheridan, Janie and Strang, John (2001) The role of the community pharmacist in drug abuse: a comparison of service provision between Northern Ireland and England/Wales. Pharmacy World & Science, 23, (1), pp. 13-16.

McElnay, James C and Hughes, Carmel M and McKenna, P and Hughes, Glenda F (1999) Abuse / misuse of non-prescription drugs. Pharmacy World & Science, 21, (6), pp. 251-255.

Wazaify, M and Kennedy, S and Hughes, Carmel M and McElnay, James C (2005) Prevalence of over-the-counter drug-related overdoses at Accident and Emergency departments in Northern Ireland--a retrospective evaluation. Journal of Clinical Pharmacy and Therapeutics, 30, (1), pp. 39-44. https://doi.org/10.1111/j.1365-2710.2004.00607.x.

Wazaify, Mayyada M and Hughes, Carmel M and McElnay, James C (2006) The implementation of a harm minimisation model for the identification and treatment of over-the-counter drug misuse and abuse in community pharmacies in Northern Ireland. Patient Education and Counseling, 64, (1-3), pp. 136-141. https://doi.org/10.1016/j.pec.2005.12.008.