It is impossible for your healthcare provider to know whether you will develop insomnia while taking Fortical. Also, in some cases, if a person does develop insomnia, it can be difficult to know whether these problems are caused by the medication or other factors.
If you develop insomnia while taking Fortical, make sure to talk with your healthcare provider. He or she may be able to recommend other treatments, including adjusting the Fortical dosage or trying another osteoporosis medicine.