high blood pressure
"I have been taking Bystolic for a month and a half now.  My blood pressure topped out at 214/122 while I was pregnant, and after many tests, I was diagnosed with chronic hypertension. I was switched around a lot but nothing worked for me until my doctor put me on Valturna and Bystolic.  Bystolic works well for bringing down diastolic pressure, which seems to be my problem.  I started on 40 mg/day and am down to 20 mg/day.  I'm bottoming out so I'm sure he'll be lowering my dose again.  It does make you tired at first but people should wait it out. The effects of this medicine can take 2 to 4 weeks to fully work.  I'm no longer tired and my blood pressure is significantly lower and safe now."