Orthostatic hypotension is a condition of abnormal blood pressure regulation upon standing. The blood pressure quickly decreases, more than 20/10 mm Hg, when rising from a lying down or sitting position to a standing position.
Measuring of Blood Pressure
Copyright © Nucleus Medical Media, Inc.
Orthostatic hypotension has several causes.
- Hypovolemia is the most common cause. It may be due to:
- Impaired autonomic (nerve) reflex due to certain diseases:
- Decreased heart muscle contractility or vascular responsiveness
- Monoamine oxidase (MAO) inhibitors
- Tricyclic antidepressants
- Tetracyclic antidepressants
- Phenothiazine antipsychotic drugs, such as chlorpromazine, promazine, thioridazine
- Atypical antipsychotics
Last reviewedSeptember 2013by Michael J. Fucci, DO
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.