A counter to blood vessel dilation, midodrine is a what is called a vasopressor and constricts small blood vessels to increase blood pressure. Hypotension is the medical term for low blood pressure (less than 90/60). A blood pressure reading appears as two numbers. The first and higher of the two is a measure of systolic pressure, or the pressure in the arteries when the heart beats and fills them with blood. Related symptoms are Dizziness or lightheadedness; Fainting; Blurred or fading vision; Nausea; Fatigue; Lack of concentration, shock. Low blood pressure is a reading of less than 90/60mmHg. Treatmnets to be used ,Use more salt. Experts usually recommend limiting salt in your diet because sodium can raise blood pressure, sometimes dramatically. ...Drink more water. Fluids increase blood volume and help prevent dehydration, both of which are important in treating hypotension,Wear compression stockings,Medications. Rising slowly from a sitting or lying position may help ease symptoms. It does not always cause symptoms, but you may need treatment if it does.