Reduced blood pressure that results in lightheadedness

low blood pressure occurring in some people when they stand up

sudden drop in blood pressure which produces a blackout or feeling of faintness, experienced by the newly injured and by tetraplegics on changing too quickly from a lying to an upright position.

Feeling faint when standing up quickly.

The reduction of blood pressure resulting in light-headedness.

A decrease in blood pressure that occurs on standing.

A drop in blood pressure (hypotension) due to a change in body position (posture) when a person moves to a more vertical position: from sitting to standing or from lying down to sitting or standing. Postural hypotension is more common in older people. See the entire definition of Postural hypotension

(pos-cher-al hi-po-ten-shun): Also known as orthostatic hypotension, it is characterized by low blood pressure which can cause dizziness and fainting after standing or sitting up quickly. Sometimes an early side effect when starting some psychotropic medicines.