Pharmacist Dave Pompei often sees customers “walking through the over-the-counter aisles with a confused look on their face.” Chances are, this has been you at one point in time.When that pounding headache strikes, seeking a wave of relief in a swirling sea of multicolored pills, syrups (and sprays!) is a headache of its own.When you’re feeling bad, where do you start? As anyone who has ever squinted to read a medicine label through a fever-induced haze knows, this question is trickier than it seems, especially given the fact that 81 percent of drug consumers don’t know the active ingredient in Advil.QUIZ: How Healthy Are You Feeling?We’ve answered four common myths so you can cut through the clutter and be on your way to feeling beautiful, stat.Myth #1: Shop By Brand NameWrong. Many top brands add extra ingredients that you don’t need to treat your symptom. As such, you should always shop by symptom (not by brand name or by bottle size).