For me, I can see the effects quickly, but the time it takes to show effectiveness varies from person to person. Talk to you psychiatrist if you are worried that you may not be responding to the drug. He or she is in the best position to assess whther your dose should be increased, you should try another medication, or should just stay the current course.
One of my blog posts describes what I am currently on, and this magic formula has been adjusted many times. See "My Current Bipolar Disorder Medications" http://mybigfatbipolardisorder.blogspot.com/2012/02/biplar-disorder-medications-currently.html
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