Yes, you have to consistently take your meds at about the same time every day for them to work. They can take up to a couple months to work depending on which med it is (certain antipsychotics like Zyprexa should work a lot quicker).
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I would do the same thing. I would find something that worked and find a minor fault and tell my doc I want to try something different. I've been on the same combo for a month now and it's working so I'm going to actively try not to do that.