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Blood pressure - low

Overview Treatment
Definition:
Low blood pressure is an abnormal condition where a person's blood pressure (the pressure of the blood against the walls of the blood vessels during and after each beat of the heart) is much lower than usual, which can cause symptoms such as dizziness or lightheadedness.
Alternative Names:
Hypotension; Low blood pressure
Considerations:

When the blood pressure is too low, there is inadequate blood flow to the heart, brain, and other vital organs.

A blood pressure level that is borderline low for one person may be normal for another. The most important factor is how the blood pressure changes from the normal condition. Most normal blood pressures fall in the range of 90/60 mm Hg to 130/80 mm Hg, but a significant change, even as little as 20 mm Hg, can cause problems for some people.

Common Causes:

Low blood pressure is commonly caused by drugs such as the following

  • Medications used for surgery
  • Anti-anxiety agents
  • Treatment for high blood pressure
  • Diuretics
  • Heart medicines
  • Some antidepressants
  • Narcotic analgesics
  • Alcohol

Other causes of low blood pressure include the following:

Another common cause type of low blood pressure is orthostatic hypotension, which results from a sudden change in body position, usually from lying down to an upright position.

Effects of age on blood pressure
Effects of age on blood pressure
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