It is impossible for your healthcare provider to know beforehand whether you will develop insomnia while taking Celexa. Also, in some cases, if a person does develop insomnia, it is challenging to know whether the problem is caused by the patient's medical condition or Celexa itself. This is because insomnia is common with depression.
If you develop insomnia while taking Celexa, make sure to talk with your healthcare provider. There are other treatments that he or she may be able to recommend, including adjusting the Celexa dosage or trying another depression medication.