One of the first 2 songs on save me is about xanax. Wzrd has plenty lean references
Xanax is not lean (codeine, promethazine, syrup, or purple).
Future doesn't rap about or sip Lean anymore, but he does still fukk with pills & bars.
You can hear it in his voice when he raps/sings. He has the pill jaw at times...you can hear it.