Clinical decision making is a complex process that depends on human ability to provide undivided attention and to memorize, recall, and synthesize huge amounts of data – all vulnerable areas. IT systems can improve access to pieces of information, organize them, and identify links between them. Clinicians often ‘know’ the information (such as a patient's allergies, a drug recall warning, or a drug–drug interaction) but forget to consider it at the time of prescribing. IT systems are effective in bridging this ‘knowing–doing’ gap [13], by presenting the relevant information to the clinician at the time of decision making.