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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.
Other hydrocodone-containing syrups such as Histinex HC, Hycotuss, and Hycodan may also be used, but Hycodan has added homatropine to deter abuse. Syrup also is made with over-the-counter cough syrups such as Robitussin DM, which contain dextromethorphan as the cough suppressant.