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How long does it take for Celexa (citalopram) to take effect?

Hello, antidepressants take about 2 to 4 weeks to take effect, with the maximum effect usually reached after 8 to 12 weeks of treatment. You may feel the effects of the antidepressant begin to show in a few days. In terms of anxiety, citalopram may be less stimulating than sertraline, and the stimulant effect you were experiencing with sertraline should disappear quickly, usually within a few days. Does this answer your question?