Low Blood PressureSymptoms, Doctors, Treatments, Advances & More
Learn About Low Blood Pressure
Low blood pressure occurs when blood pressure is below normal. This means the heart, brain, and other parts of the body may not get enough blood. In adults, the normal blood pressure is between 90/60 mmHg and 120/80 mmHg.
The medical word for low blood pressure is hypotension.
Hypotension; Blood pressure - low; Postprandial hypotension; Orthostatic hypotension; Neurally mediated hypotension; NMH
Blood pressure varies from one person to another and also over time for any given person. A drop of as little as 20 mmHg can cause problems for some people. There are different types and causes of low blood pressure.
Severe hypotension (shock) can be caused by sudden loss of blood (shock), severe infection, heart attack, or severe allergic reaction (anaphylaxis).
Orthostatic hypotension means your blood pressure drops when you shift from lying down to standing. This type of low blood pressure usually lasts only a few seconds or minutes. If this type of low blood pressure occurs after eating, it is called postprandial orthostatic hypotension. This type most often affects older adults, those with high blood pressure, and people with Parkinson disease.
Neurally mediated hypotension (NMH) most often affects young adults and children. It can occur when a person has been standing for a long time. Children usually outgrow this type of hypotension.
Certain medicines and substances can lead to low blood pressure, including:
- Alcohol
- Anti-anxiety medicines
- Certain antidepressants
- Diuretics
- Heart medicines, including those used to treat high blood pressure and coronary heart disease
- Medicines used for surgery
- Painkillers
Other causes of low blood pressure include:
- Nerve damage from diabetes or other disorders
- Changes in heart rhythm (arrhythmias)
- Not drinking enough fluids (dehydration)
- Heart failure
Symptoms of low blood pressure may include:
- Blurry vision
- Confusion
- Dizziness
- Fainting (syncope)
- Lightheadedness
- Nausea or vomiting
- Sleepiness
- Weakness
Lower than normal blood pressure in a healthy person that does not cause any symptoms often does not need treatment. Otherwise, treatment depends on the cause of your low blood pressure and your symptoms.
When you have symptoms from low blood pressure, sit or lie down right away. Then raise your feet above heart level.
Severe hypotension caused by shock is a medical emergency. You may be given:
- Blood or other fluids through a needle (IV)
- Medicines to increase blood pressure and improve heart strength
- Other medicines, such as antibiotics
Treatments for low blood pressure after standing up too quickly include:
- If medicines are the cause, your provider may change the dosage or switch you to a different medicine. Do not stop taking any medicines before talking to your provider.
- Your provider may suggest drinking more fluids to treat dehydration.
- Wearing compression stockings can help keep blood from collecting in the legs. This keeps more blood in the upper body.
People with NMH should avoid triggers, such as standing for a long period of time. Other treatments include drinking fluids and increasing salt in your diet. Talk to your provider before trying these measures. In severe cases, medicines may be prescribed.
BIDMC Department Of Neurology
Roy Freeman is a Neurologist in Boston, Massachusetts. Dr. Freeman is rated as an Elite provider by MediFind in the treatment of Low Blood Pressure. His top areas of expertise are Orthostatic Hypotension, Familial Dysautonomia, Low Blood Pressure, and Multiple System Atrophy.
BIDMC Department Of Neurology
Christopher Gibbons is a Neurologist in Boston, Massachusetts. Dr. Gibbons is rated as an Elite provider by MediFind in the treatment of Low Blood Pressure. His top areas of expertise are Familial Dysautonomia, Orthostatic Hypotension, Multiple System Atrophy, Low Blood Pressure, and Tissue Biopsy.
Brigham And Women's Hospital, Heart And Vascular Center
Scott Solomon is a Cardiologist in Boston, Massachusetts. Dr. Solomon is rated as an Elite provider by MediFind in the treatment of Low Blood Pressure. His top areas of expertise are Heart Failure with Preserved Ejection Fraction (HFpEF), Heart Failure, Atherosclerosis, Heart Bypass Surgery, and Pacemaker Implantation.
Low blood pressure can usually be treated with success.
Falls due to low blood pressure in older adults can lead to a broken hip or spine fracture. These injuries can reduce a person's health and ability to move about.
Sudden severe drops in your blood pressure starve your body of oxygen. This can lead to damage of the heart, brain, and other organs. This type of low blood pressure can be life threatening if not treated right away.
If low blood pressure causes a person to pass out (become unconscious), seek treatment right away. Or call 911 or the local emergency number. If the person is not breathing or has no pulse, begin CPR.
Call your provider right away if you have any of the following symptoms:
- Black or maroon stools
- Chest pain
- Dizziness, lightheadedness
- Fainting
- Fever higher than 101°F (38.3°C)
- Irregular heartbeat
- Shortness of breath
Your provider may recommend certain steps to prevent or reduce your symptoms including:
- Drinking more fluids
- Getting up slowly after sitting or lying down
- Not drinking alcohol
- Not standing for a long time (if you have NMH)
- Using compression stockings so blood does not collect in the legs
Summary: A major cause of admission to intensive care is acute circulatory failure resulting from organ hypoperfusion due to factors such as hypotension and myocardial dysfunction. The standard treatment, including volume expansion and vasopressor/inotropic agents, often leads to water and sodium overload, increasing the risk of morbidity and mortality in the ICU. The combination of this overload and myoca...
Summary: Very preterm neonates (born before 32 weeks' gestation) often require invasive mechanical ventilation (IMV) to manage respiratory insufficiency. In France, around 8,250 infants are born annually at \<32 weeks, with an estimated 5,000 needing IMV. Although non-invasive support such as continuous positive airway pressure (CPAP) has become more common, a substantial proportion of these neonates still...
Published Date: January 01, 2025
Published By: Linda J. Vorvick, MD, Clinical Professor Emeritus, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
Calkins H, Everett TH, Chen P-S. Hypotension and syncope. In: Libby P, Bonow RO, Mann DL, Tomaselli GF, Bhatt DL, Solomon SD, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 12th ed. Philadelphia, PA: Elsevier; 2022:chap 71.
Schrigern DL. Approach to the patient with abnormal vital signs. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 7.