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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.
It is a prescription medication available in syrup form that contains promethazine and dextromethorphan. It is used to prevent coughing and a runny nose. Promethazine is an antihistamine that lessens coughing by decreasing postnasal drip, the secretions that drain from the sinuses into the throat.