Can I stop taking celexa (citalopram) after 9 years?

Yes. Talk to your doc about how to do it and what to expect and if that is the right choice for you.
Celexa (citalopram) Discuss with your prescribing doctor to come up with gradual tapering plan to avoid withdrawal.
Yes, but... You should only stop a medication after discussing this with your md. Abruptly stopping Celexa (citalopram) may trigger some unpleasant symptoms and there is a risk that your anxiety/depression symptoms will return.