CINAHL, the Cumalative Index to Nursing and Allied Health Literature, is the definitive research database for nursing and allied health professionals.
CINAHL Complete also contains summarized medical information in the form of 'Quick Lessons' & 'Evidence-based care sheets'- for more information, see the EBSCO CINAHL articles.
To use it and many other online resources you will need a Health Library Ireland (HLI) account.