When should i start medication for blood pressure?

140/90: The standard "cutoff" is 140/90. However, keep in mind that the optimum blood pressure for long life is 100/60--and mortality progressively increases as the blood pressure rises above 100/60. Blood pressure is like blood sugar--the lower the better, as long as you feel well. Before starting medication, I suggest supplementing with potassium and magnesium--which are deficient in most people.