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A narcotic drink that makes the user feel extremely drowsy and often euphoric. Lean must contain the following in order to be authentic. Promethazine and Codeine cough syrup and sprite. The Promethazine is essentially what gives the lean affect. Many use jolly ranchers to enhance the flavor the beverage.
Over the years, a variety of manufacturers have developed their own cough drop formulas. Each one has tried to improve the flavor and efficacy of their product. Raw Materials. Cough drops have two categories of ingredients. One type makes up most of the cough drop while the other is the active, or functional, ingredients. The major portion of cough drops is made up of ingredients found in typical hard candy recipes. The essential ingredients include sugar, corn syrup, acids, colors, and flavors. Sugar is a disaccharide compound called sucrose.