high blood pressure
"After taking this medicine for a week or two I experienced numbness (lack of blood flow) to my fingers. Usually one or two fingers. Also happens with my toes. I have really high blood pressure and it does lower it but the numbness which usually lasts about 30 minutes, but returns throughout the day, is scary.

  Also it gives me terrible nightmares, very  violent. I'll wake up wondering how I could even have such terrible dreams.  It also makes me tired. I've stopped it several times and each time the bad symptoms go away completely in about 2 days.  I'm going to have to stop taking it for good, the nightmares are just too terrible."