Metoprolol
"Initially received this at Urgent Care because I couldn't get into my doctor when my blood pressure was high at a employer mandated check.  I was on it 3 weeks, 2 pills a day at 25 mg each. It brought the BP down by about 20 points.  The side effects were cold feet mid morning, trouble sleeping, and the dosage did not last a full 12 hours.  I could feel the heart slow down at about 1 hour after medicating and then start to speed up again at about 9 hours.  I had to be careful not to take it close to bedtime because it made me feel hyper about 2-3 hours after the dose.  Upon reflection, these side effects were less than some of the other stuff I've taken since."