Pharmacotherapy and over-the-counter drug use among elderly in Belgrade, Serbia.

From November 2012 to January 2013, 480 seniors were recruited at the Pubic Health Center in Belgrade, Serbia. The patients' records were validated by four independent investigators. Data on over-the-counter (OTC) drug use were collected through a questionnaire. Polypharmacy, an intake of ≥5 prescribed medications, reported in 10.4% of seniors, was associated with cardiovascular (odds ratio [OR] = 3.07; 95% confidence interval [CI] = 1.12-8.39) and endocrine diseases (OR = 2.25; 95% CI = 1.05-4.84) as well as with the number of treated chronic conditions (OR = 2.45; 95% CI = 1.75-3.44). The most frequently used OTC drugs were analgesics (metamizole, diclofenac and acetaminophen) and vitamins (vitamin C and vitamin B complex). The number of treated chronic conditions was associated with use of OTC drugs (OR = 1.17; 95% CI = 1.01-1.36). Multiple chronic conditions correlated with multiple OTC drug use (ρ = 0.125, p = 0.019). Our analysis indicated that the prevalence of polypharmacy and OTC drug use in the elderly are comparable to those in industrialized countries.