Is it permissible for a mentally ill person to smoke cannabis if it treats him and restores him to his normal state, knowing that he maintains his prayers and fears dying in this condition?

What has been mentioned is a psychotic disorder resulting from drug abuse, causing social and functional impairment. It is imperative to immediately stop drug use and follow up with a specialized doctor for the treatment of addiction and the psychotic disorder. The situation may necessitate residence in a rehabilitation center. Pharmacological and psychological treatments are absolutely essential to prevent the worsening of the condition.