meth and truth

"Methamphetamine:
-releases high levels of the neurotransmitter dopamine, which stimulates brain cells
-damages brain cells that contain dopamine and serotonin, another neurotransmitter.
-over time, causes reduced levels of dopamine, which can result in symptoms of severe movement disorders."

conflicting information, which is confusing, because i'm studying (iin part) dopamine and serotonin. So at first, it makes more dopamine, but then causes lower levels. Too much dopamine appears to be a cause of schizophrenia (along with a lot of other things) So what does that have to do with movement and stimulation? Schizophrenics aren't usually maniac.

and serotonin: its levels are increased by antidepressents, serotonin gives you energy. so that makes sense that too little will cause movement disorders. maybe i should divert my topic to neurophysiology (study of the nervous system) and how that is affected by drugs in general. but i'm getting interested in the mental illness part, so i think i'll just keep going.
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thought for the day: "Truth means trust. trusting someone to tell the truth."