Research reveals an unusual case where long-term cannabis use triggered psychosis and led a patient to consider violence against his spouse while ending their marriage. A 35-year-old man developed severe psychotic symptoms when he used Cannabis indica for eight years and caused these problems after he quit his habit. Extended cannabis abuse worsened his mental illness and prompted physical attacks on his wife which started the divorce process. Doctors discovered that Cannabis was causing the patient’s mental problems so they prescribed Olanzapine and Lorazepam. He received medical treatment and joined both a cannabis recovery program and therapy sessions with his family while understanding CBT methods. His psychotic symptoms reduced during hospital care but his trust issues and anger toward his wife stayed the same. This case shows how extended cannabis use leads to mental and social problems while showing the need for starting treatment fast and seeking long-term help with full family support so people with risk of psychosis and violence due to cannabis can recover better.