high blood pressure
"Was put on bystolic for high blood pressure induced by stress. This is a horrible medication.  I was only on 12.5 mg once a day and side effects were intolerable.  Extreme flushing and feeling of anxiety. ...stomach pain.  My blood pressure actually spiked after taking this medication.  Also caused bad insomnia.  I was in bed awake until 4 a.m. for 3 nights in a row when I finally decided to go my doctor and got switched to another medication.  Seems doctors are always trying to push the new and latest version of drugs, just to report back to the drug  companies.  Will never take it again."