It’s highly intoxicating and the side affects are severe. Check out the link. It explains a lot.
… 6. Lean is a mixed drink originating in the Southern Rap culture. It is a mixture of Promethazine and Codeine cough syrup and a soft drink such as Sprite (usually). While other soft drinks may be used, Sprite was the original.
[And now also Arizona Watermelon for Watermelon Drank/Lean]
There are some variations of Lean. For example, Promethazine and Codeine syrup is usually Purple in color. But there are other colors of syrup that work the same way. There is a golden-colored syrup (hydrocodone based) and other colors as well.
Lean slows you down. It makes you feel good. It’s meant to be sipped on, and it taste damn good. One of the best feelings you will ever experience. Euphoria with a hint of sedation. …”
Lean is also the drug mixture that killed Pimp C.
DXM” is an abbreviation for the cough suppressant Dextromethorphan Hydrobromide — which is the active ingredient in the cough-syrup brand Robitussin.
DXM causes physical and psychological effects that may be frightening or unpleasant… Psychological effects can include profound disorientation, depression, a feeling of personal disintegration, or a feeling of “unreality” and disconnection that may persist for days. Chronic use may cause depression, psychological dependency, and possibly brain damage. Large doses may be associated with psychotic breaks…
In answer to the question “What’s the DXM Trip Like” the author says:
“Well, that depends on how much you take. There are four different kinds of experiences, based on the dosage; these are called plateaus.
The first plateau is a mild stimulant effect with a little bit of a buzz, and has been compared to MDA [a more psychedelic cousin of MDMA -aka-"Ecstasy"].
The second plateau is more intoxicating and has been compared to being drunk and stoned at the same time.
The third plateau is dissociative, like a lower dose of ketamine.
The fourth plateau is fully dissociative like a higher dose of ketamine.
You should not [emphasis original!] attempt higher plateau doses unless you have someone with you who can take care of you in case you get sick or freak out. It happens on DXM.”