unawareness Alzheimer’s disease 1 Article 1 Brand 1 OTC advertisement 1 Perceived risk 1 Price information 1 Purchase intention 1 advertising 1 anosognosia 1 attention 1 attitude to health 1 behavior 1 consumer 1 decision making 1 dementia 1 direct-to-consumer advertizing 1 drug information 1 drug quality 1 generic drug 1 health care cost 1 health care system 1 human 1 implicit awareness 1 misconception 1 non prescription drug 1 personal experience 1 price 1 purchase behaviour 1 quality 1