DXM is NOT lean.

Lean is codeine syrup, a pain killer.

DXM is totally different. Just because they are both used for treating cough doesn’t mean their pathways are the same.

Lean is not this. Lean is cough syrup containing codeine and promethazine, not cough syrup containing dextromethorphan.

lean aka purple drank — https://en.wikipedia.org/wiki/Lean_(drug)