Mad Dog 20/20, often referred to simply as MD 20/20, is a fortified wine known for its high alcohol content and vibrant, often fruity flavors. As a fortified wine, it contains added alcohol, typically resulting in an ABV (alcohol by volume) of around 13-18%. This makes it a potent ingredient when used in cocktails, providing both a strong kick and a distinct, sweet taste.

In the context of cocktails, MD 20/20 can be used to add bold flavors and a high-proof punch. Its various flavors, such as grape, orange, and banana red, can complement or contrast with other ingredients, creating unique and memorable drinks. The sweetness of MD 20/20 can balance out more bitter or sour elements in a cocktail, making it a versatile addition to a mixologist's repertoire. However, due to its strong flavor and high alcohol content, it should be used thoughtfully to avoid overpowering the other components of the drink.