Lean, also known as "purple drank" or "sizzurp," is a recreational drug concoction made with cough syrup. It typically contains codeine, an opioid, and promethazine, an antihistamine. The cough syrup is often combined with soda and sometimes hard candy. Lean is highly addictive and can lead to serious health effects, including respiratory depression, overdose, and, in some cases, death due to its highly addictive nature and the potential for harmful side effects