Treatment for high cortisol depends on what’s causing it. If excess cortisol is coming from a tumor in the pituitary gland, the adrenal glands, or elsewhere in the body, surgery to remove that tumor is the first-line approach. When surgery isn’t possible or doesn’t fully work, doctors turn to medications that either block cortisol production or block its effects on the body. Radiation therapy serves as a backup for pituitary tumors that can’t be fully removed.
Finding the Source First
Before choosing a treatment, doctors need to confirm that cortisol is genuinely elevated and figure out where the excess is coming from. The most common screening test is a 24-hour urine collection that measures how much cortisol your body is producing over a full day. Normal ranges vary by sex: roughly 16 to 147 nmol/day for women and 22 to 238 nmol/day for men. Overnight dexamethasone suppression tests and late-night salivary cortisol tests are also used.
Once high cortisol is confirmed, blood tests and imaging narrow down the cause. About 70% of cases stem from a small, benign tumor on the pituitary gland that pumps out too much of the hormone that tells your adrenal glands to make cortisol. This is called Cushing’s disease. Other causes include tumors on the adrenal glands themselves, tumors elsewhere in the body producing the same signaling hormone, or long-term use of prescription corticosteroids like prednisone.
Surgery as the Primary Treatment
For pituitary tumors, surgeons typically operate through the nose and sinuses to reach the base of the brain, a procedure called transsphenoidal surgery. This approach avoids opening the skull and has a relatively short recovery period. In a long-term study of 78 patients, this surgery cured 72% of cases, with cure defined as the disappearance of both clinical symptoms and abnormal lab values within six months. Patients with smaller tumors tend to have better outcomes than those with larger ones.
After successful pituitary surgery, your cortisol levels will drop, often dramatically. In the weeks that follow, many patients actually need temporary cortisol replacement because their body’s cortisol-producing system has been suppressed by months or years of overproduction. That system typically takes two to five months to recover, though in some cases it can take six to twelve months. Your body’s signaling hormones normalize first, followed by your morning cortisol levels, and finally your adrenal glands’ ability to respond to stress.
If the problem is a cortisol-producing tumor on one of the adrenal glands, removing that gland solves the issue. The remaining adrenal gland eventually picks up the slack. In rare, severe cases where both adrenal glands need to be removed, you’ll need lifelong hormone replacement therapy, taking daily cortisol and aldosterone replacements to compensate for what those glands would normally produce.
Medications That Lower Cortisol
Medications are used when surgery doesn’t fully work, when a patient is too sick to undergo surgery safely, or when the source of excess cortisol can’t be removed. These drugs fall into two categories: those that reduce how much cortisol your adrenal glands produce, and those that block cortisol from acting on your tissues.
Drugs That Reduce Cortisol Production
Several medications slow down the adrenal glands’ cortisol-making machinery. Ketoconazole, originally developed as an antifungal, is one of the most commonly used, typically starting at 400 mg per day. Metyrapone is another option, often started at 750 mg per day. Both doses get adjusted upward based on how your cortisol levels respond, with ketoconazole going as high as 1,200 mg and metyrapone up to 3,000 mg in some patients.
Osilodrostat (Isturisa) is a newer option, started at 2 mg twice daily and adjusted every two weeks. It requires more monitoring than older drugs: you’ll need baseline heart rhythm testing, correction of any potassium or magnesium imbalances before starting, and regular urine cortisol collections every one to two weeks until your levels stabilize. Once you’re on a maintenance dose, monitoring shifts to every one to two months.
Pasireotide (Signifor) works differently. Instead of acting on the adrenal glands, it targets the pituitary tumor itself, reducing the signal that tells the adrenals to overproduce cortisol. It’s given as an injection twice daily.
None of these medications are a cure. They manage cortisol levels for as long as you take them, and they may not completely eliminate all symptoms of excess cortisol.
Blocking Cortisol’s Effects
Mifepristone (Korlym) takes a different approach entirely. Rather than lowering cortisol production, it blocks cortisol from binding to its receptors throughout the body. This means cortisol levels in your blood may stay the same or even rise, but the hormone can’t do as much damage to your tissues. It’s specifically approved for people with Cushing’s syndrome who also have type 2 diabetes or glucose intolerance and who aren’t surgical candidates or whose surgery didn’t work.
The blood sugar improvements can be significant. In clinical trials, 57% of patients with elevated HbA1c levels (a measure of long-term blood sugar control) saw those levels return to normal. The average HbA1c dropped by 1.1 percentage points, and nearly half of patients on diabetes medications were able to reduce them. Early signs of whether the drug is working, including changes in blood sugar, insulin levels, and mood, typically show up within six weeks.
One risk with mifepristone is that by blocking cortisol so effectively, it can tip you into cortisol insufficiency, causing fatigue, nausea, low blood pressure, and low blood sugar. Your doctor will watch for these symptoms and adjust the dose accordingly.
Radiation for Pituitary Tumors
Radiation therapy targets pituitary tumors that weren’t fully removed by surgery or that have grown back. The main drawback is speed: it works slowly. In a study of 70 patients treated with focused radiation, only about 29% achieved remission within the first year. By two years that rose to 50%, and by five years, 74%. The median time to remission was 24 months, so most patients need cortisol-lowering medication to bridge the gap while waiting for radiation to take full effect.
The other significant concern is damage to the rest of the pituitary gland. Because the pituitary controls thyroid function, growth hormone, and reproductive hormones, radiation can knock out those systems over time. Newer, more focused radiation techniques cause new hormone deficiencies in about 23% of patients, while older conventional radiation caused deficiencies in roughly half. The risk increases with longer follow-up, meaning some problems may not surface for years.
When High Cortisol Comes From Medications
The most common cause of high cortisol symptoms is actually prescription corticosteroids like prednisone, dexamethasone, or hydrocortisone taken for conditions like asthma, autoimmune diseases, or organ transplants. In these cases, the treatment is straightforward in concept but requires patience: your doctor will gradually taper your dose rather than stopping abruptly. Stopping suddenly can trigger adrenal crisis because your own adrenal glands have been dormant while the medication did their job.
Recovery of your body’s natural cortisol production after stopping long-term corticosteroids follows a predictable sequence. Your pituitary signaling hormones come back first, then your baseline morning cortisol levels, and finally your adrenal glands’ ability to mount a stress response. For most people, this process takes 4 to 12 weeks, but after very long courses of steroids, full recovery can stretch to a year.
What Recovery Looks Like
Regardless of the treatment approach, recovering from prolonged high cortisol is a slow process. Even after cortisol levels return to normal, many of the physical effects, including weight gain around the midsection and face, thinning skin, muscle weakness, and bone loss, take months to improve. Some patients describe the months after successful treatment as surprisingly difficult because cortisol levels are now low or normal, and their body has to readjust to functioning without the excess.
During this recovery window, fatigue and body aches are common as your system recalibrates. Bone density improvements can take one to two years to show up on scans. Weight redistribution happens gradually over six to twelve months for most people. Mood and cognitive symptoms like difficulty concentrating or emotional instability often improve faster, within the first few months of normalized cortisol.