"i&#039;ve been of risperidone for about 2-3 years and now i have a prolactinoma. it could be a coincidence -- although i know risperidone is notorious for causing high prolactin. as for any other side effects, i didn&#039;t experience any. i&#039;m having a hard time getting off of this medication now that the doctor told me to stop taking it, because i can&#039;t sleep without it."