About 8 days: Celexa (citalopram) has a half-life of 37 hours. In general, it requires five half-lives for a medication to be out of your system. Therefore, it should take about 8 days for the Celexa (citalopram) to be out of your system. Discontinuing a SSRI, like Celexa (citalopram), can result in serious problems and should be done under physician supervision.
Answered 7/10/2016
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