Abstract
Knowledge and self-efficacy concerning interactions of antihypertensives with over-the-counter (OTC) analgesics and alcohol were assessed in 51 adults aged 60 and older taking antihypertensives and attending a blood pressure clinic. The subjects had low self-efficacy about how to prevent interactions of antihypertensives with OTC analgesics and alcohol. Inspection of knowledge item responses revealed eight general misconceptions about OTC medications. These data guide educating those with hypertension about potential drug interactions arising from self-medication.