Supervise people's mental health issues when they are prescribed dangerous drugs

Vulnerable people suffering from mental health issues should be supervised when prescribed pills like Amitriptyline in a controlled environment with a healthcare professional. Sometimes people who are suffering from mental health problems don't think rationally like other people. They are vulnerable and need protection from harm. So why would you put them in harm’s way with lethal drugs? We lost my mother the worst way possible and it could have been prevented.