I want to jump in here. Malgus, As GS stated people are sick prior to receiving any medicines. It’s important to keep that fact in mind. It is not the drug making people sick. Not all sick individuals can be helped with drugs. In the end it takes drugs like Thorazine to control really sick minds and it turns the patient into a zombie (minus the aggression). One of the strongest drugs they will give to help control behavioral problems while a person is on the street, is lithium and it is not always effective. As GS has pointed out, the grabbers want you to believe their narrative. It is always false. The grabbers do not want to address the root problem of mental health, you never hear any grabber address mental health as the solution to this problem.
Prior to the 70’s States maintained mental health facilities that housed many of the types of individuals we see today involved in mass shootings. Today those facilities are closed. In today’s world the only help they can receive is limited by the policy limits of their health plan. Beyond the limits of the plan families are are their own. Typically hospital stays in the mental health ward are very short. Doctors are reluctant to prescribe the stronger medicines until all other methods have been exhausted, and then they don’t always work. In the end the ill person cannot be treated in a secure facility until they hurt either themselves or someone else and are placed in a facility under a court order. Unlike in the past. And that is why we have people with personality disorders loose killing people in schools. A simplified version.