What is it?

Orthostatic intolerance is a condition in which a person has difficulty maintaining blood pressure and blood flow to the brain when standing upright. It can cause a range of symptoms, including dizziness, fainting, and fatigue.

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Signs & symptoms


Dizziness or lightheadedness when standing up
Fainting or near-fainting when standing up
Fatigue or weakness, especially after standing for prolonged periods
Nausea or vomiting
Palpitations or racing heart rate
Blurred vision or visual disturbances
Cognitive difficulties, including brain fog and difficulty concentrating
Shortness of breath


A medical professional can diagnose orthostatic intolerance by conducting a series of tests, including a tilt table test, which involves being strapped to a table that is tilted at different angles while your heart rate and blood pressure are monitored. Other tests may include a blood test to rule out other conditions, such as anemia or hypoglycemia, and a physical exam.


Treatment for orthostatic intolerance typically involves lifestyle changes, such as increasing fluid and salt intake, wearing compression stockings, and avoiding triggers that may worsen symptoms, such as hot environments or prolonged standing. Medications may also be prescribed, such as fludrocortisone, midodrine, or beta-blockers. In severe cases, intravenous fluids or medications may be needed.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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