ABSTRACT
Background: Drug interactions are major cause of concern in hospitalized patients with cardiac illness especially in elderly population. Therefore, the study was conducted to determine the prevalence and pattern of potential drug-drug interactions (pDDI) and risk factors, if any.Methods: It was a prospective observational study involving 75 elderly in-patients with cardiac diseases. IHEC approval was taken before commencement of study and written informed consent was taken from all the study participants. Data was collected using structured data collection tool. pDDI were analyzed using MEDSCAPE databse. Data was analyzed using SPSS 20.0 in terms of descriptive statistics. Pearson correlation coefficient was used to find the association between the risk factors and potential DDIs. P value of ?0.05 was considered statistically significant.Results: The prevalence of pDDI was found to be 100%. Total 593 pDDI and 33 interacting drug pairs were observed in the study. The common drug interacting pairs were aspirin and furosemide 140 (23.61%), followed by aspirin+ enalapril 98 (16.53%) and heparin and clopidogrel 56 (9.44%). Majority of pDDI 480 (81%) were found to be of moderate severity. A significant association was documented between length of hospital stay (p=0.041) and occurrence of pDDI. A statistically significant correlation (r =0.621; p<0.01) was noted between number of drugs prescribed and total number of pDDIs.Conclusions: A high prevalence of pDDI was observed. The prevalence rate is directly related to number of drugs prescribed and length of hospital stay. Therefore, close monitoring of hospitalized patients is recommended.
ABSTRACT
Background: Prescribing in elderly is a challenging task as they have age related physiological changes, various co-morbidities, altered pharmacological properties and higher propensity for adverse events. They are often prescribed medications which are potentially inappropriate for them, sometimes may even be unnecessary. The medicines are considered as inappropriate if the risk associated with them outweighs benefits. The objective of this study is to assess the prevalence of potentially inappropriate medications (PIM) at a tertiary care teaching hospital according to the Beers updated 2015 criteria and STOPP criteria and to compare the two criteria in detection of PIMs.Methods: A prospective observational study involving 228 elderly patients (>65years) of medicine wards was conducted from October 2015 to March 2016. Relevant information was recorded in a predesigned proforma. The use of potentially inappropriate medications is assessed using Beers updated 2015 criteria and STOPP criteria using descriptive statistics.Results: The prevalence of PIM use in the sample was 26.31% according to the 2015 Beers criteria and 14.03% using the STOPP criteria. The most prevalent PIM according to the Beers criteria were sliding scale insulin (17.54%) and long acting benzodiazepines (5.26%); according to the STOPP criteria, they were aspirin in heart failure (5.26%) and chlorpheniramine (3.07%).Conclusions: The prevalence of PIM varied when different criteria were applied. The 2015 Beers criteria identified more PIM than the STOPP criteria.