This at wiki: "In late 2019 Peterson sought "emergency" detox from benzodiazepine addiction. Peterson stated this rehab was the result of his prescribed dosage of clonazepam being increased after his wife Tammy was diagnosed with kidney cancer. According to Peterson, he made several attempts to reduce dosage or stop the drug completely, but experienced "horrific" benzodiazepine withdrawal syndrome.
In January 2020, Peterson was unable to find North American doctors willing to accommodate his treatment desires and so flew to Moscow, Russia along with his daughter, son-in-law, and granddaughter to pursue treatment there. Doctors in Russia diagnosed him with pneumonia in both lungs upon arrival and placed him into a medically induced coma for eight days, followed by four weeks in the intensive care unit, during which time he suffered a temporary loss of motor skills."