Amy Knight demonstrates that only 4% of warnings in CPOE are accepted.

Knight AM, Falade O, Maygers J, Sevransky JE. Factors associated with

medication warning acceptance for hospitalized adults. J Hosp Med. 2015

Jan;10(1):19-25.

http://onlinelibrary.wiley.com/doi/10.1002/jhm.2258/pdf