Will a calcium channel blocker lower my blood pressure if I need it for high heart rate and not blood pressure?

My doctor was going to prescribe me a calcium channel blocker for fast heart rate but my but my blood pressure wasn't high. Does this mean its dose dependendent ane a low dose doesn't decreases heart rate without blood pressure? And does a low dose of a medication mean i will be less likely to experience... show more My doctor was going to prescribe me a calcium channel blocker for fast heart rate but my but my blood pressure wasn't high. Does this mean its dose dependendent ane a low dose doesn't decreases heart rate without blood pressure? And does a low dose of a medication mean i will be less likely to experience side effects from heart rate medications like weight gain and drowsiness?
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