It is impossible for your healthcare provider to know whether you will develop insomnia while taking Adipex-P. Also, in some cases, if a person does develop insomnia, it is challenging to know whether these problems are actually caused by Adipex-P or other factors.
If you develop insomnia while taking Adipex-P, make sure to talk with your healthcare provider. There are other treatments that he or she may be able to recommend, including adjusting the Adipex-P dosage or trying another weight-loss drug.