Countrywide prevalence of critical drug interactions in Hungarian outpatients: a retrospective analysis of pharmacy dispensing data

Analysis of interaction risks of patients with polypharmacy and the pharmacist interventions performed to solve them-A multicenter descriptive study according to medication reviews in Hungarian community pharmacies

Objective

The study examined the Drug-Related Problems (DRPs) of patients with polypharmacy in 78 Hungarian community pharmacies, especially the interaction risks in terms of their clinical severity. Also, the objective was to analyze pharmacists’ interventions to solve the identified interaction risks.

Methodology

The research was carried out in the framework of the training of specialist pharmacists at Semmelweis University, with the participation of 78 graduated pharmacists with the collaboration of 98 GPs. A total of 755 patients participated in pharmaceutical counseling which meant a medication review process. DRPs were uniformly categorized and the interventions were recorded by pharmacists, while a detailed analysis of interaction risks was performed by authors.

Results

A total of 984 DRPs were registered. The most common category of DRPs was the "non-quantitative safety problems" (62.6%). Interaction risk was the most common cause of DRPs (54.0%). The highest proportion of interaction risks were between two prescription drugs (66.7%). In 30.7% of interaction risks’ cases, there was not known negative outcome. In contrast, it was recommended to modify the therapy in 14.9% of interaction risks. Acetylsalicylic acid (22.8%), acenocoumarol (17.7%), and diclofenac (13.9%) were the most common active substances which caused serious interaction risks.

A total of 599 pharmacist interventions were used to solve the 531 interaction risks. Pharmacists notified the GPs about the problem in 28.4% of cases and they intervened without the GP in 63.1% of cases, most often with patient education (27.4%).

Conclusion

Medication review by community pharmacists is required for the safe medicine using of patients with polypharmacy, as a significant number of DRPs have been recorded. The incidence of interaction risks stood out. It is essential to develop a pharmaceutical guideline to properly classify the clinical relevance of interaction risks (e.g. according to high-risk active substances) and to increase the collaboration with GPs.

Potential Drug-drug Interactions Analysis in Children Out-patients with Bronchopneumonia Medication Prescriptions

Drug-drug interactions (DDIs) is defined as the alteration of efficacy and toxicity of some drugs in the presence of other drugs. In the treatments of bronchopneumonia in outpatient settings, there is a lack of documentation of DDIs. This study was aimed to observe the potential DDIs on the prescriptions of children with bronchopneumonia. An observational and cross-sectional study was conducted on outpatient children with bronchopneumonia prescriptions during 2017. Potential for DDI was identified by online drug interaction checkers. The potential DDI then classified based on its severity (minor, moderate, and major) and mechanism (pharmacokinetic and pharmacodynamic). Among 86 prescriptions analyzed, potential DDIs observed at 48.84% of it. Of that, there were 67 potential DDIs where 72.34% of it were categorized as moderate. The majority of potential DDIs was pharmacodynamic interaction (76.12%) with the most frequently involved drug pair was Ephedrine-Salbutamol (29.85%). Children outpatients with bronchopneumonia are at risk of potential DDIs, especially to minor and moderate potential DDIs. Prescriptions screening for potential DDIs followed by monitoring of therapeutical effects and associated adverse drug events will optimize patient safety.