Thanks for asking question. For high blood pressure salt is to be taken minimum. Today pottasium salt gaining popularity in place of routine salt. But your serum creat is high and if it is because of kidney disease then Potassium taken to a minimum as in kidney disease potassium elimination by kidney is reduced. So after evaluating renal function properly , potassium salt can be started. For relieving high blood pressure regular exercise, avoidence of smoking , fruits are helpful. I hope you understand my concern