Are interventions to reduce interruptions and errors during medication administration effective?

"There is weak evidence of the effectiveness of interventions to significantly reduce interruption rates and very limited evidence of their effectiveness to reduce medication administration errors. Policy makers should proceed with great caution in implementing such interventions until controlled trials confirm their value." 

Are interventions to reduce interruptions and errors during medication administration effective?: a systematic review
MZ Raban, JI Westbrook
BMJ Quality and Safety, 2014; 23: 414-421

Read more here.