Question by  GaryVentimiglia (21)

How long is the half life of the celexa I take for insomnia?

I feel drowsy half the day.


Answer by  AnnaH (24)

It depends on your dose but the average half life of Celexa is about 37 hours. That definitely would explain why you are drowsy. That's a pretty long half life. Usually if a medicine has a long half life that points toward more risks than those with a shorter half life. I would suggest switching medicine.


Answer by  severaltimes (247)

Drowsiness is a known side effect of Celexa (citalopram). Its half-life is approximately 37 hours. Taking any other drugs or alcohol within that period- or even within the same week) may contribute to the drowsiness.


Answer by  worker8740 (33)

The half-life is approximately 35hrs. This can be variable. Certain chronic conditions, such as renal failure, can affect the way the metabolizes medications and cause them to absorb at a different rate. Celexa should never be stopped abruptly. This is a relatively short half-life when compared to other SSRI's.


Answer by  aratliff (111)

Celexa can take six to eight days to get fully out of your system. The actual half-life of Celexa is 35 hours.

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