I recently lost 60 lbs. Six weeks ago I started getting dizzy when lowering my head onto my pillow at night and also when lifting my head off the pillow in the morning. This would last 3-4 seconds. I had been taking 10MG of Norvasc for several years at my higher weight. I had my vitals taken and both my blood pressure and heart rate were lower than I have ever seen them (113/67 and 52) I starting cutting the pill in half and the dizziness lessened but was still present. My vitals remained low. Yesterday, I had an EKG that was "abnormal". I was told I was dropping heart beats and should see a Cardiologist. I will be 58 next month and have NEVER had an abnormal EKG. I have done some research and it appears that some Channel Blockers do cause irregular heatbeats. Can Amlodipine (Norvasc) be causing this abnormality?