The name sounds worse than it is.
Here is a readable summary from a psychiatrist's blog.
From the comments:
My son, also on Lithium, or supposed to be, is self-medicating with pot.
His rationale is that he needs it to stay calm and focused.
"But what about the Lithium?" I ask, "You felt OK when you were taking it regularly."
He replies, "Having to take it makes me feel like I can't be in control of myself."
When I point out that he is just substituting the pot for the Lithium, he just gets that blank stare, shutting me out.
In the mean time, he's getting (more) depressed because he can't get a job because every employer is drug screening applicants these days.
But he refuses to quit the pot and get back on the Lithium.