Amlodipine
"I was first prescribed a combination pill Amlodipine-Benazepril 10/20mg and after 29 days of taking it I suffered an allergic reaction called Angieodema (Face swelled up)  and it turns out I'm allergic to Benazepril. I went 4 days with no medication and on the 4th day had a dizzy spell at work pressure was 150/118. Dr. called in a new prescription of just Amlodipine 10mg, it's only been 7 days so maybe it's not enough time. However my pressure spiked today to 154/120!!! I feel Great however, I don't have any muscle cramps. I did experience a rapid heart beat a few days ago. My concern is maybe the mg's are too low. Dr is saying to wait 2 weeks to get full effect of the pill. I will update in 2 weeks."