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How to lower diastolic blood pressure

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Lowering diastolic BPMedicationsSymptomsHow long does it take to lower?Contacting a doctorSummary
Diastolic blood pressure is the second number in blood pressure (BP) readings, indicating the pressure in blood vessels between heartbeats. Lifestyle strategies or specific drugs may help manage BP.
Medically reviewed by Danielle Hildreth, RN, CPT
Updated on February 27, 2023

High BP occurs when your blood vessels become stiff, and your heart must work harder to push blood through. Doctors can diagnose high blood pressure if the first or second number in a blood pressure reading is high.

High blood pressure, also called hypertension, is a common health condition affecting half of all adults and can be a significant health condition for older adults.

If left untreated, it can lead to other serious health conditions, such as: 

  • stroke
  • eye conditions
  • heart disease
  • kidney disease
  • vascular dementia

Systolic blood pressure, which is the first number in a BP reading, is the pressure in your blood vessels when the heart is pumping. Diastolic blood pressure is the pressure between pumps when your heart is at rest.

Both systolic and diastolic blood pressure are linked and changing one will also change the other.

The American College of Cardiology (ACC) defines the blood pressure stages as follows:

  • Normal BP: a systolic reading of less than 120 and a diastolic reading of less than 80
  • Elevated BP: a systolic reading of 120–129 and a diastolic reading of less than 80
  • Stage 1 hypertension: a systolic reading of 130–139 and a diastolic reading of 80–89
  • Stage 2 hypertension: a systolic reading of over 140 and a diastolic reading of over 89

How to lower diastolic blood pressure

A small group of adults in workout clothing getting ready to do some outdoor walking which may hep lower diastolic blood pressure
FG Trade/Getty Images

Most people can manage and lower their blood pressure with daily practices. These can include:

  • eating a diet of vegetables, fruits, whole grains, proteins, dairy, and healthy oils
  • avoiding added salt 
  • drinking alcohol in moderation 
  • exercising regularly
  • managing weight
  • avoiding smoking 
  • managing stress
  • getting enough sleep


There are several types of antihypertensive medications used to treat high blood pressure. However, they all work differently and may affect other organs, such as your kidneys. Therefore, it is crucial to tell your doctor about any other health conditions you have so they can help you determine your best treatment plan.

They will generally start with specific first-line blood pressure medications before moving on to other, stronger options.

Angiotensin converting enzyme (ACE) inhibitors

These medications lower blood pressure by preventing your body from making angiotensin II, an enzyme that narrows the blood vessels.

Without this enzyme in your bloodstream, your blood vessels dilate, and your heart doesn’t need to pump as hard.

Drugs in this class include:

Angiotensin II receptor blockers (ARBs)

These medications block the angiotensin II enzyme from binding with receptors in the blood vessels so they don’t constrict and become narrow.

These drugs include:


Beta-blockers block specific hormones, like adrenaline, from working. This can lower the heart rate and make it easier for blood to flow. Common beta blockers include:

Calcium channel blockers

Calcium channel blockers block calcium ions from entering the cells in the heart muscle, which can cause your blood vessels to dilate and decrease your heart rate. This type of medication includes:

Thiazide and thiazide-like diuretics

Although doctors don’t entirely understand how they work in the body, thiazide and thiazide-like diuretics are usually first-line treatments for hypertension. This drug type includes:


Diuretics pull fluid from the bloodstream, decreasing the pressure in the blood vessels. Diuretics include:

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Medications to avoid 

If you have high blood pressure, your doctor will likely tell you to avoid certain other medications that may raise your blood pressure.

For example, phenylephrine is an ingredient in over-the-counter medication like Sudafed PE and is commonly used to relieve cold, flu, and allergy symptoms. This can increase your blood pressure. Other drugs that contain phenylephrine include Vazculep and Biorphen.

Some medications used for emergencies will also increase blood pressure, such as epinephrine. Other medications that contain epinephrine include:

  • Symjepi
  • Adyphren, Adyphren II, Adyphren Amp, and Adyphren Amp II
  • Epinephrine Snap-EMS and Epinephrine Snap-V
  • Adrenalin
  • Auvi-Q
  • Epinephrine Professional
  • EpiPen and EpiPen-Jr

Are there any symptoms of high diastolic blood pressure?

High blood pressure can be especially dangerous because it frequently has no symptoms. Often, people will not know they have high blood pressure until a routine blood pressure checkup at a doctor’s office, or they have a heart attack or stroke. 

According to the American Heart Association, high blood pressure usually does not cause headaches, nosebleeds, or other symptoms unless you are in a hypertensive crisis, which is a medical emergency.

How long does blood pressure take to lower?

It’s not always easy to predict how quickly your blood pressure will decrease. For example, some medications may lower your blood pressure in under an hour, while diet and exercise changes may take a few months.

When to see a doctor

Check your blood pressure regularly and talk with your doctor if your blood pressure is consistently higher than 130/80.

If your blood pressure is over 180/120, rest, wait 5 minutes, and retake your blood pressure. If it remains above 180/120, consider contacting a doctor as soon as possible.


Diastolic blood pressure is the pressure in your blood vessels between heartbeats when your heart is resting. It correlates with systolic blood pressure, and the same treatments will affect both. 

If you have high blood pressure, your doctor may recommend lifestyle changes, medication, or both.

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