Clinical (MeSH) Computerised provider order systems (MeSH) 1 Decision Support Systems, Clinical 1 Decision support systems 1 Drug Hypersensitivity 1 Drug Interactions 1 Hospitals 1 Humans 1 Medical Order Entry Systems 1 Medication alert systems (MeSH) 1 Medication error (MeSH) 1 Retrospective Studies 1 Saudi Arabia 1 clinical decision support system 1 drug hypersensitivity 1 drug interaction 1 hospital 1 human 1 physician order entry system 1 retrospective study 1