Duplication of therapy within drug classes was found in 8.0% of the study population (n = 23), which was most frequently observed with calcium channel blockers (n = 6, 2.1%) and acetylcholinesterase inhibitors (n = 4, 1.4%), while dual antiplatelet therapy with aspirin plus clopidogrel as secondary stroke prevention was prevalent in 5.2% (n = 15). This evidence concerns the gene ACHE and Stroke.