Drug-related problems identified by clinical pharmacists in an academic medical centre in Thailand

Background:Drug-related problems (DRPs) are important issues that interfere with therapeutic outcomes and can cause adverse events. Pharmacists play a vital role in identifying and resolving DRPs. This study aimed to determine the characteristics, and severity of DPRs, including clinical pharmacists' interventions.Method:A retrospective study was conducted at Ramathibodi Hospital, a tertiary university hospital in Thailand. We collected data from the drug-related problem system and the electronic medical record. Descriptive statistics were performed with Statistical Package for Social Sciences (SPSS) software version 18.0.Results:There were 580 patients (20.44%) who had at least one DRP. We classified 1255 DRPs based on Cipolle-Strand-Morley Criteria 2012. The most common DRPs were the need for additional drug therapy (27.09%), followed by dosage too low (26.93%) and dosage too high (22.31%). Anti-infective agents (23.71%) and omeprazole (2.70%) were the most common drug groups and drugs causing DRPs, respectively. The severity of DRPs was mostly categorised to be 'no harm' (95.46%). Almost all of the interventions were completely accepted by physicians (99.12%).Conclusion:The most common DRPs were the need for additional drug therapy and dosage adjustment of antimicrobial agents. The clinical pharmacists on wards are effective in preventing and resolving DRPs.