You can find an argument on the internet to support any point of view, but I was interested to stumble across these statements written by a psych attending:

"Keeping people on antipsychotics forever is a peculiar Americanism and is much less common in many parts of the world. ...we learn how to start people on antipsychotics, but not really how to get them off... In general, I have seen people go slowly on this... without anything bad happening."

"[Antipsychotics] are not benign, quite apart from causing brain rot, metabolic syndrome, tardive syndromes, osteoporosis. In the face of drugs, life events, etc., a relapse is just as likely on or off meds." (emphasis mine)

"Heck, I don't have a chronic serious mental illness, and if you gave me 20 of Haldol and 30 of Zyprexa for 5 years, I think my receptors would be a little off naturally and take a while to reacclimate if I stopped taking it...does that mean the Haldol and Zyprexa are good drugs for me?"

There are also plenty of studies to show that life-long prophylaxis is absolutely necessary in order to avoid relapse and hospitalizations. The point is that there are opposing views, and research isn't definitive; however, how many people take their meds faithfully and still end up in the hospital time and time again? How many people who take their meds faithfully are able to return to their former profession successfully? What about those who take their meds faithfully and are declared permanently disabled? Very frustrating.

Regardless of how I weigh in on this debate, IMO there's no excuse for messing with one's meds without medical supervision.