It isn't just by injection or intravenously, they already have a pill for people who suffer from schizophrenia that allows they to track them and monitor if they are taking their meds. Might be a good deep dive topic for you to get into as exactly how this works, I am overloaded at the moment, given the number of people who are out there doing mass shootings who are mentally ill. Exactly what does it entail and how it works this capability to track and monitor the severely mentally ill wondering amongst us in this world.
RE: Doctors 'Public Enemy #1' Per the Washington Times