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Treatments and drugs
By Mayo Clinic staffTreatments for Cushing's syndrome are designed to lower the high level of cortisol in your body. The best treatment for you depends on the cause of the syndrome. Treatment options include:
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Reducing corticosteroid use. If the cause of Cushing's syndrome is long-term use of corticosteroid medications, your doctor may be able to keep your Cushing's signs and symptoms under control by reducing the dosage of the drug over a period of time, while still adequately managing your asthma, arthritis or other condition. For many of these medical problems, your doctor can prescribe noncorticosteroid drugs, which will allow him or her to reduce the dosage or eliminate the use of corticosteroids altogether.
Don't reduce the dose of corticosteroid drugs or stop taking them on your own. Do so only under your doctor's supervision. Abruptly discontinuing these medications could lead to deficient cortisol levels. Slowly tapering off corticosteroid drugs allows your body to resume normal cortisol production.
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Surgery. If the cause of Cushing's syndrome is a tumor, your doctor may recommend complete surgical removal. Pituitary tumors are typically removed by a neurosurgeon, who may perform the procedure through your nose. If a tumor is present in the adrenal glands, lungs or pancreas, the surgeon can remove it through a standard operation or in some cases by using minimally invasive surgical techniques, with smaller incisions.
After the operation, you'll need to take cortisol replacement medications to provide your body with the correct amount of cortisol. In most cases, you'll eventually experience a return of normal adrenal hormone production, and your doctor can taper off the replacement drugs. However, this process can take up to a year or longer. In some instances, people with Cushing's syndrome never experience a resumption of normal adrenal function; they then need lifelong replacement therapy.
- Radiation therapy. If the surgeon can't totally remove a pituitary tumor, he or she will usually prescribe radiation therapy to be used in conjunction with the operation. Additionally, radiation may be used for people who aren't suitable candidates for surgery. Radiation can be given in small doses over a six-week period, or by a technique called stereotactic radiosurgery or gamma-knife radiation. In the latter procedure, administered as a single treatment, a large dose of radiation is delivered to the tumor, and the radiation exposure to surrounding tissues is minimized.
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Medications. Medications can be used to control cortisol production when surgery and radiation don't work. Medications may also be used before surgery in people who have become very sick with Cushing's syndrome. Doctors recommend drug therapy before surgery to improve signs and symptoms and minimize surgical risk. Medications to control excessive production of cortisol include ketoconazole (Nizoral), mitotane (Lysodren) and metyrapone (Metopirone).
In some cases, the tumor or its treatment will cause other hormones produced by the pituitary or adrenal gland to become deficient and your doctor will recommend hormone replacement medications.
If none of these treatment options is effective, your doctor may recommend surgical removal of your adrenal glands (bilateral adrenalectomy). This procedure will cure excess production of cortisol. However, your ACTH levels will remain high, possibly causing excess pigmentation of your skin.
- Cushing's syndrome. National Institute of Diabetes and Digestive and Kidney Diseases. http://endocrine.niddk.nih.gov/pubs/cushings/cushings.htm. Accessed June 7, 2010.
- Cushing's syndrome information page. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/cushings/cushings.htm?css=print. Accessed June 7, 2010.
- Niemann LK. Clinical manifestations of Cushing's syndrome. http://www.uptodate.com/home/index.html. Accessed June 5, 2010.
- What is Cushing's syndrome? Cushing's Support and Research Foundation. http://csrf.net/page/the_basics.php. Accessed June 7, 2010.
- Niemann LK. Establishing the cause of Cushing's syndrome. http://www.uptodate.com/home/index.html. Accessed June 5, 2010.
- Niemann LK. Establishing the diagnosis of Cushing's syndrome. http://www.uptodate.com/home/index.html. Accessed June 5, 2010.
- Niemann LK. Causes and pathopsychology of Cushing's syndrome. http://www.uptodate.com/home/index.html. Accessed June 5, 2010.
- Niemann LK. Overview of the treatment of Cushing's syndrome. http://www.uptodate.com/home/index.html. Accessed June 5, 2010.
- Dietary supplement fact sheet: Vitamin D. National Institutes of Health. http://ods.od.nih.gov/factsheets/vitamind.asp. Accessed June 11, 2010.
- Nippoldt TB (expert opinion). Mayo Clinic, Rochester, Minn. June 17, 2010.
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