Mountain Dew, Purchase, NY, has introduced MDX. Pioneering a new category of “energy sodas,” MDX features the familiar citrus flavor of Mountain Dew, but is fueled by a “power pack” of ingredients, including ginseng, guarana, taurine and D-ribose—helping to provide a higher level of energy than regular soda. MDX is packaged in a single-serve, 14-oz. PET bottle.