At Precision Care: Endocrinology & Diabetes, we provide specialised diagnostic testing to assess hormone function and detect endocrine disorders. The Dexamethasone Suppression Test (DST) is a crucial tool in evaluating the body's cortisol levels and diagnosing conditions related to adrenal gland function. This test helps determine if your body is producing too much cortisol, a hormone essential for stress response, metabolism, and immune function.

What is the Dexamethasone Suppression Test?

The Dexamethasone Suppression Test measures how the body regulates cortisol production. Dexamethasone, a synthetic steroid, is used to suppress cortisol secretion, and the test helps identify whether the adrenal glands are functioning properly.

This test is primarily used to diagnose:

• Cushing’s Syndrome – A condition caused by excessive cortisol production.
• Adrenal Tumors – To differentiate between adrenal and pituitary causes of excess cortisol.
• Pituitary Disorders – To assess how the pituitary gland influences adrenal hormone production.

How the Test Works

The Dexamethasone Suppression Test follows a structured approach:

• You will take a prescribed dose of dexamethasone, usually at night.
• A blood sample is collected the next morning to measure cortisol levels.
• In some cases, additional doses and blood tests may be required over a 24–48 hour period.

The results help determine whether your body appropriately suppresses cortisol production in response to dexamethasone.

Who Needs a Dexamethasone Suppression Test?

Your doctor at Precision Care: Endocrinology & Diabetes may recommend this test if you exhibit symptoms of excessive cortisol, such as:

• Unexplained weight gain, particularly around the face and abdomen.
• High blood pressure and blood glucose levels.
• Thinning skin and easy bruising.
• Fatigue, muscle weakness, or mood changes.
• Irregular menstrual cycles or decreased libido.

If you have risk factors for adrenal or pituitary disorders, early diagnosis through this test can help guide appropriate treatment.

Interpreting the Results

The test results are interpreted based on cortisol suppression:

• Normal Response – Low cortisol levels indicate proper suppression.
• Abnormal Response – Persistent high cortisol levels suggest Cushing’s syndrome or other adrenal dysfunctions.

Further testing may be required to confirm a diagnosis and identify the underlying cause.

Schedule Your Test Today

At Precision Care: Endocrinology & Diabetes, we are committed to providing accurate and timely diagnostic services. If you or a loved one is experiencing symptoms of cortisol imbalance, schedule your Dexamethasone Suppression Test with us today. Our team will guide you through the process and ensure you receive the best care tailored to your needs.