I Am Experiencing Significant Parities (itching) All Over My Torso,

I am experiencing significant parities (itching) all over my torso, scalp, face, past 6-8 months duration. My medications (hypertension) include metoprolol succinate, amlodipine, enalapril maleate and hydrochlorothiazide. I have been taking these meds for past 10 years (at least) without any symptoms of itching, My dermatologist feels that the amlodipine, because it is a calcium channel blocker is causing the itching that has recently become intolerable. My cardiologist disagrees. what do you think?