Menu   WellSpan Health

Health Library

Health Library

Antidiuretic Hormone

Does this test have other names?

Vasopressin, arginine vasopressin, ADH

What is this test?

This test measures how much antidiuretic hormone (ADH) is in your blood.

ADH is made by your hypothalamus. ADH keeps the amount of water in your body in balance. Certain conditions can affect the amount of ADH that your body makes. These include hyponatremia, or low sodium levels in your bodily fluids. They also include diabetes insipidus. Symptoms of this condition include urinating often and being very thirsty.

Why do I need this test?

You may have this test if your health care provider thinks you have a problem that affects your ADH levels. 

What other tests might I have along with this test?

Your health care provider may also order other tests, including a water deprivation test. In this test, you stop drinking fluids for several hours. Then your urine and blood are measured to see how many solid particles they have.

Your provider may also order a water loading test. In this test, you drink certain amounts of water. Then your provider measures the water levels in your urine over time.

What do my test results mean?

Many things may affect your lab test results. These include the method each lab uses to do the test. Even if your test results are different from the normal value, you may not have a problem. To learn what the results mean for you, talk with your health care provider.

Normal ADH levels in adults vary from 0 to 5 pg/mL.

Higher than normal results may mean that you have lung tumors, central nervous system tumors, or a fluid problem after surgery. Or you may have porphyria. This is a very rare blood enzyme deficiency.

Low levels of ADH may mean you have diabetes insipidus or damage to the pituitary gland. Or you may have primary polydipsia. This is extreme thirst because of hypothalamus problems or mental illness.

How is this test done?

The test requires a blood sample, which is drawn through a needle from a vein in your arm.

Does this test pose any risks?

Taking a blood sample with a needle carries risks that include bleeding, infection, bruising, or feeling dizzy. When the needle pricks your arm, you may feel a slight stinging sensation or pain. Afterward, the site may be slightly sore.

What might affect my test results?

Rarely smoking can make ADH levels higher. Other uncommon causes of higher levels of ADH are pregnancy and taking morphine or certain antidepressants.   

How do I get ready for this test?

Tell your health care provider if you smoke, drink alcohol, or take medicines.  Be sure your provider knows about all medicines, herbs, vitamins, and supplements you are taking. This includes medicines that don't need a prescription and any illicit drugs you may use.

  

Antidiuretic Hormone - WellSpan Health

Author: Scott, Jennifer Acosta
Online Medical Reviewer: Sather, Rita, RN
Online Medical Reviewer: Ziegler, Olivia Walton, MS, PA-C
Last Review Date: 2015-05-24T00:00:00
Last Modified Date: 2015-07-27T00:00:00
Published Date: 2015-07-27T00:00:00
Last Review Date: 2012-06-25T00:00:00
© 2015 WellSpan Health. All Rights Reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

I would like to:

Are you sure you would like to cancel?

All information will be lost.

Yes No ×

About the provider search

This search will provide you with WellSpan Medical Group and Northern Lancaster County (Ephrata) Medical Group primary care physicians and specialists. If we don’t have a WellSpan Medical Group physician to meet your criteria, the search will expand to include community physicians who partner with WellSpan Medical Group physicians through the WellSpan Provider Network or provide care to patients on the Medical Staffs of WellSpan’s Hospitals.

×

Schedule Your Next Appointment Online with MyWellSpan

Use your MyWellSpan patient portal any time to view available appointments, and pick the date and time that best suits your schedule.

Go to MyWellSpan

New to this practice?

If you don't have a WellSpan primary care provider and would like to schedule a new patient appointment with a provider who is accepting patients, just log into your MyWellSpan account, and go to the Appointment Center section. As you progress through the scheduling process, you will be able to see the offices that are accepting new patients in relation to your zip code. If you are not enrolled in MyWellSpan, go to www.mywellspan.org, call 1-866-638-1842 or speak with a member of the staff at a participating facility to sign up. New patient scheduling not available at all practices/programs.

Already a patient at this practice?

If you already have a relationship with a WellSpan practice, simply log into your account, and go to the Appointment Center section. As you progress through the scheduling process, you will be able to schedule an appointment with any provider or practice that already counts you as a patient. Online scheduling varies by practice/program.

×