Multimorbidity and polypharmacy are very common in geriatric patients, hence why they are subject to greater risks for adverse reactions of medications. The use of inappropriate medication with those patients can additionally increase the risk for adverse reactions. The purpose of the research was to establish the extent and characteristics of inappropriate prescriptions of medication for geriatric patients at the medico-geriatric clinic in Frankfurt on the Main at both the point of admission and discharge of patients. For the analysis of the prevalence of inappropriate prescriptions we chose the 2010 Priscus criteria and 2012 Beers criteria. The research data was obtained from admission letters, which were collected from the patients archive. Only therapies of patients, who were transferred from another hospital to the geriatric clinic for further mobilisation and recovery, were examined. While establishing the prevalence of inappropriate prescriptions we only used the part of the 2012 Beers criteria which includes substances, independent of the concomitant illnesses. 145 of the over 65 years old patients, included in the research, received at the admission into the geriatric clinic 9.70 medications, while at discharge they received 8.68 medications. According to the 2010 Priscus criteria 17.24 % of the elderly received at least one inappropriate substance at the admission into the geriatric clinic and 9.66 % at discharge. According to the 2012 Beers criteria 40.00 % of the elderly received at least one inappropriate substance at the admission into the geriatric clinic and 21.38 % at discharge. We discovered that the elderly, who received at least one inappropriate substance according to 2010 Priscus or 2012 Beers criteria, both at admission and discharge from the geriatric clinic, were prescribed statistically significantly more medications in comparison with elderly, who did not received any inappropriate substance. According to 2010 Priscus criteria amitriptyline and clozapine were the most often prescribed medications at admission while zolpidem was most often prescribed at discharge. According to the 2012 Beers criteria ibuprofen was most often prescribed at admission and spironolactone at discharge. Further we discovered that according to the 2010 Priscus criteria two patients were receiving two inappropriate substances simultaneously. According to the 2012 Beers criteria ten elderly were receiving two inappropriate substances simultaneously, while three elderly patients were receiving even three inappropriate substances simultaneously.
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