Hi, I was wondering if you would tell me what you think about this. I have been taking 100mg of Toprol XL(50mg in am and 50mg in pm) for 8 years for rapid heartbeat and high blood pressure. I also have an inner ear dysfunction that causes me to feel like I am in motion ALL the time. I can't afford to see the cardiologist anymore and have to see a regular MD. Due to problems with circulation, the dr. wants me to cut out one of my toprol and take 120mg of tiazac. i am TERRIFIED to do this. I have to do something to help my circulation but am toooo scared to try it. I am instead trying to cut back on the dosage of toprol--which is very hard. Do you think it would be safe to try the tiazac????? Thanks, Belle