It is often not the common side effects: "gain weight, fall asleep and experience involuntary muscle jerking" that cause people to stop taking meds. It is that their brain feels different, not like how it should be.
Now involuntary muscle jerking has a high stigma. It can, in the worst cases be highly visible. The new drugs seem to stop this drawback and instead introduces vomiting. That would be even worse.
The worst part of the article though is the frequent reference to homeless people. and that seems to be written by someone who has no idea of the realities.
A majority of homeless people do not have access to even basic healthcare. There are different reasons for this, but it is true of the majority. You dont have a look that closely to see open wounds, some infected, esp on feet and legs. These are basic healthcare concerns. Probably they have several other conditions that require treatment, and deficiencies due to a lack of food period, and certain lack of food that is nutritious and healthy.
Are the doctors just going to walk up and down the lines of homeless giving out bottles of pills and hope the world will change?
These types of drugs should always be closely monitored by a psychiatrist. Which is made nearly impossible with homeless people. (not to mention the cost. It could have high co-pays but I hope there are programs that can mitigate this.
The only way to do this is to give the person a place to live. Ensure the person has healthy and decent food. This will require time and treatment so build up a new sense of safety.
Once achieved treatment for schizophrenia could start with the drug and be closely monitored by professionals.
None of the drugs to treat mental health issues will work on all, And some people will have strong side effects.