Peterson had a major clobenzepam (benzo) addiction stemming from a Doctor prescribing it for anxiety. The dosages increased as he dealt with his wife's Cancer.
He eventually ran out of options here in NA as he kept relapsing and couldn't kick the habit so he went to Russia to be put into a medically induced coma so that he could not walk out of the rehab.
From what others have reported about their negative benzo experiences (the late Taylor Hawkins from the Foo Fighters was found to have it in his system along with other prescription drugs) can last a year or longer and his brain just appears fried now.
https://newrepublic.com/article/1568...ordan-peterson