The normal starting dosage for
Norvasc is 5mg which can be increased to 10mg, but when you get close to the highest recommended
dose, you become more at risk of the known side effects. Is this the only Calcium channel blocker you have tried?
When I had vasospasm in my Left Anterior Descending, I was put onto Diltiazem, 60mg three times a day. I took it for three months then stopped and the vasospasm has been gone ever since. I stopped taking them in November 2010.