wa3lykoum aslaam wr wb
that is not true at all. Dosages are increased based on appropriateness, there is an entire science dedicated to
Pharmacokinetics and pharmacodynamics
you may read about it here:
http://www.boomer.org/c/p1/
It is not a random decision.. there are algorithmic rules, Given that many drugs in and of themselves cause the side effects and at higher dosages can be lethal!
I can't imagine any doctor simply increasing the dose because they felt like it, or because someone wasn't responding .. it is a decision based on sound judgment!
Psychologists aren't medical doctors, thus they are not allowed to write prescriptions, how can they increase dosages when they aren't board licensed or qualified to dispense medications? That is not true either.. Some diagnosis are made purely on clinical presentation, but 'symptoms' is a nondescript term for a host of diseases.. wrong diagnosis are sometimes made but to err is human.. it isn't due to the reasons you mention.. and there is a tenuous process to insure that errors aren't made or kept at a minimum!
waslaam 3lykoum wr wb