But unlike a mainstream medical drug like insulin, psychotropic medications have no measurable target illness to correct, and can upset the very delicate balance of chemical processes the body needs to run smoothly.

Nevertheless, psychiatrists and drug companies have used these drugs to create a huge and lucrative market niche.

And they’ve done this by naming more and more unwanted behaviors as “medical disorders” requiring psychiatric medication.
https://www.cchr.org/documentaries/marketing-of-madness/introduction.html