Drug-related problems and determinants among elective surgical patients: A prospective observational study.

The prevalence of drug-related problems is high among elective surgical patients. The indication-related problems were the most common category of drug-related problem identified among elective surgical patients. The presence of complication, American Society of Anesthesiologists Physical Status ⩾ 2, and postoperative antibiotics were the independent predictors of drug-related problems.