A prospective observational study on daily intake of drugs, supplements and herbal products and detection of adverse drug reactions in elderly patients.

Abstract

Polytherapy is a common condition in the elderly patient and represents a risk factor for the onset of adverse drug reactions (ADRs). The objectives of this prospective study were the verification of the compliance with implicit criteria (Lipton, MAI and POM) to geriatric prescriptions, the identification of ADRs and the estimatation of the intake of drugs, over-the-counter (OTC) drugs, supplements and herbal products through the administration of a questionnaire. A total of 400 elderly patients (average age 73 years) were analyzed between September 2018 and September 2019. 79.5% of them were in polytherapy (≥4 drugs). The most frequently prescribed drugs were antihypertensives (75%). The use of OTC drugs was reported for 12% patients; the use of supplements for 25% of patients and the use of herbal products only for 2% patients. The prescriptions analysed resulted in compliance with the implicit criteria in terms of dosage, therapeutic indications and the presence of any drug allergies. ADRs were reported for 10% of patients: those related to nintedanib (53%) and pirfenidone (34%) were the most frequent.