There are many simple ways to prevent low blood pressure. The main prevention methods include avoiding standing or sitting for a long time in the same position, drinking plenty of liquid, avoiding alcohol and limiting or avoiding caffeine. If you feel dizzy or lightheaded, sit down or lie down for a few minutes, or sit down and put your head between your knees. This will help your blood pressure go back to normal and help your symptoms go away.
Attribution: Straight Talk Foundation