How long does it take for celexa (citalopram) to get out of your system?

7 1/4 days: The half-life of Celexa (citalopram) is 35 hours. Usually it takes 4-5 half-lives to remove most of a drug from the body. After 3 days, more than 50% of Celexa (citalopram) will be gone. After 7 days and 6 hours, about 97% of the drug will be removed from your system if your liver, and to a lesser extent your kidneys, are operating normally. Some people are super or slow metabolizers of drugs, so the time could vary.