Does Low BP Cause Sleepiness?

Yes, low blood pressure (hypotension) can cause sleepiness or fatigue. Hypotension is generally defined as a blood pressure reading lower than 90/60 mm Hg. When blood pressure is lower than normal, it can affect the body’s circulation and oxygen delivery, leading to symptoms like dizziness, lightheadedness, and tiredness. Sleepiness or fatigue can result from various factors related to low blood pressure, including:

  • Reduced Blood Flow to the Brain: Low blood pressure can result in decreased blood flow to the brain. When the brain does not receive an adequate supply of oxygen and nutrients, it can lead to feelings of drowsiness and fatigue.
  • Orthostatic Hypotension: Orthostatic hypotension is a type of low blood pressure that occurs when you stand up from a sitting or lying position. It can cause a sudden drop in blood pressure, leading to dizziness and fatigue.
  • Reduced Cardiac Output: Low blood pressure can be associated with a lower cardiac output, which is the amount of blood the heart pumps per minute. This can result in reduced oxygen delivery to the body’s tissues, leading to fatigue.
  • Medications: Some medications used to treat high blood pressure (hypertension) or other medical conditions can lead to low blood pressure as a side effect. These medications can contribute to feelings of sleepiness or fatigue.
  • Dehydration: Dehydration can cause low blood pressure, and it is often associated with feelings of tiredness. Dehydration reduces blood volume, making it harder for the heart to maintain normal blood pressure.

If you experience persistent or severe low blood pressure and associated symptoms like sleepiness or fatigue, it’s important to consult a healthcare professional. Low blood pressure can be caused by various underlying medical conditions, including heart problems, endocrine disorders, and neurological conditions. Identifying and addressing the underlying cause is essential to managing low blood pressure and its associated symptoms. Your healthcare provider can perform tests to determine the cause and recommend appropriate treatment options.