I was on toprol , however because of my side effects- fatigue, ringing in hears, foggy-thinking, general overall felt bad, - my doctor has taken me off and put me on dilta- a calcium channel blocker. Just changed 7 days ago so I am still adjusting to the dilta. I've had fatigue and general overall felt bad , some anxiety , not sure if from the change from toprol or just adjusting to the new drug. It's very depressing to keep having problems. Good luck to you all!!