Vertical dizziness is a general term referring to when a person gets dizzy when standing up, or vertical, and can have many different causes.
Vertigo is caused by problems in the sensory nervous system and inner ear. Vertigo is one of the most common types of dizziness, and it makes a person feel like he's about to fall or tip over.
Low Blood Pressure
A sudden drop in blood pressure when a person sits or stands up suddenly is called orthostatic hypotension. It is a common cause of temporary dizziness. Low blood pressure can cause dizziness, because less oxygen reaches the brain.
Dizziness often happens when the heart isn't pumping enough blood to the brain, as in cases of arrhythmia, heart attack or other disease or weakness of the heart.
Dizziness can result when something goes wrong in the brain, like a stroke, tumor or dementia, that disrupts normal functioning.
The vast majority of medications list dizziness as a potential side effect. Sedatives and medications for blood pressure are some of the most likely to cause vertical dizziness.