It is impossible for your healthcare provider to know whether you will develop insomnia while taking Risperdal. Also, in some cases, if a person does develop insomnia, it is challenging to know whether these problems are because of the condition, or Risperdal itself. This is because insomnia is common with mental illnesses.
If you develop insomnia while taking Risperdal, make sure to talk with your healthcare provider. There are other treatments that he or she may be able to recommend, including adjusting the Risperdal dosage or trying another schizophrenia, bipolar disorder, or autism medication.