Psychiatric drugs are no different and follow the same approach and line of thinking. Thorazine was used in mental hospitals in the 50's to handle the same psychotics, violent criminals and schizophrenics. Again, the subject of psychology had completely failed at investigating and solving the problems which mind's have, so they forgot about it, and continued applying force as their only solution. Overwhelming the patient was and still is the only thing which creates any effect on the patient - euphemistically called a "cure". Thorazine was called the "chemical lobotomy" because the effects were similar to the brain surgery techniques - quiet, aimless, drooling patients. The psychiatrists themselves coined the term, the "thorazine shuffle", which denoted the feet-dragging of the patients following their state of drug-induced oblivion. The effects were often permanent and caused obvious brain damage. But again, heh, the patient was "better". He didn't rant, scream, run around crazily or ramble on anymore. Usually he wasn't even "there" anymore - his personality was shattered. This was another of psychiatry's "brilliant" solutions to certain of man's problems. And as usual, they had no idea how the drug even "worked". They ignore the mind, believe it not to exist, and destroy it in the process. And some people call this "science" . . .  
The problem psychiatry and the drug companies had was how to get involved in and profit from the general public. Up to then they were primarily involved in state mental hospitals and severe conditions of violent criminals and psychosis. They came up with the concept of "mental health" and slowly crept into every aspect of modern society. This involved years of PR campaigns, funding colleges and universities with attractive grants, and developing a seemingly logical "science". The "science" didn't develop as a natural evolution of man's search for knowledge. It developed only from profit motivation, and to hell with everything else.  
Every single drug which psychiatry has "developed" has been a complete experiment on human beings. To this day they have no idea how or why drugs have the effects they do. The drugs ALL have numerous harmful side-effects including violence, suicide, anxiety, sweating, rashes, memory dysfunction, cognitive impairment, emotional numbing and nervousness, to name a few. Their only suggestion is, "discontinue the drug if you experience any of these symptoms to a marked degree". They have no idea who will react adversely or to what degree. They simply don't know. This is a "science"? No, this is a farce. Legitimate "science" enables prediction - when it comes to psychiatric drug side-effects it's largely a matter of guessing - "give it a try, hope for the best, and let's see what happens". This is not "science".  
The way research is done is as follows. They examine the chemical compound of other earlier drugs, and play around with the formulas coming up with new variations. They give them new and fancy names like Xanax, Prozac and Haldol. They even sound "scientific". They must come up with new formulations because once a patent expires, the formula can be used by anyone, and the possibility of large profits disappears. So they need to develop new slight variations which can be patented. They then test them on animals first to see if they "calm", "sedate" and "control" behavior. Do you actually think they ask the animals, "do you feel happy", "is life easier to handle now", "how is your memory", "do you feel more in control", or "do you feel more able to achieve your goals"? They observe and deal ONLY with animal behavior, and that's ALL they also ever aim at addressing in humans - behavior.  
Once this is determined they test them on humans. Realize they have never had the slightest understanding of how the drugs "work" or do what they do. It's all speculation, guessing, theories and wishful thinking. They continue their "research" in this manner in the purported attempt to find the "perfect drug" that is non-addictive with no side-effects. This entirely barbaric and "unscientific" methodology is presented as "science" by "highly educated" pharmaceutical experts and psychiatrists. It's a total sham. Sure, they have nice medical buildings, expensive equipment, wear new lab coats, and seem very knowledgeable. They act very "professional", use complex nomenclature, and believe what they say. You need to look past the slick facade and confront the raw facts of what they actually are doing.  
They never can or will find any drug that will "cure" anything because every drug every created by them gets it's effect by overwhelming an aspect of the person's physiology and brain chemistry. There is almost always brain dysfunction or damage with continued use. They are often addictive. The drugs obtain their "cure" through the harmful effects on the person, their brain, and their mind. Once they find a "harmless" drug, it will also have absolutely no effect, because it is the harm that is the source of the effect. That some people experience a "bettered" subjective state changes nothing. People often have more energy or feel better on speed. People claim they are more creative while under the influence of alcohol or cocaine. So what! They are on drugs. Legal or "illegal" - there's not much difference really. So much for subjective claims.