Hydrocortisone Side Effects: What to Expect and When to Call Your Doctor

Hydrocortisone is one of the most important medications in medicine — and like most powerful drugs, it comes with a range of potential side effects. Understanding what to expect can help you use hydrocortisone safely, recognize warning signs early, and have productive conversations with your doctor.

The key thing to remember: the side effects of hydrocortisone depend heavily on the dose and duration of use. Patients taking physiological replacement doses (15-25 mg/day for adrenal insufficiency) experience far fewer side effects than patients on high-dose anti-inflammatory therapy.

Common Side Effects of Hydrocortisone

These are side effects that patients frequently notice, especially when starting hydrocortisone or when doses are increased:

Mood changes: Increased energy, irritability, anxiety, or in some cases, depression or euphoria. These are more common at higher doses.

Increased appetite and weight gain: Even at moderate doses, hydrocortisone stimulates appetite. Long-term use can cause weight gain, particularly around the abdomen.

High blood sugar (hyperglycemia): Corticosteroids raise blood glucose. Patients with diabetes need careful monitoring and may need medication adjustments. Some people develop steroid-induced diabetes.

High blood pressure (hypertension): Due to mineralocorticoid effects (sodium and water retention), hydrocortisone can raise blood pressure, particularly at higher doses.

Fluid retention and swelling (edema): Sodium retention causes water to be held in the body, leading to swelling in the legs, ankles, or face.

Insomnia: Taking hydrocortisone too late in the day can interfere with sleep. Most doctors advise taking the largest dose in the morning to align with the body's natural cortisol peak.

Stomach irritation: Hydrocortisone can cause nausea, indigestion, or stomach pain, especially on an empty stomach. Take it with food.

Skin changes: Topical hydrocortisone can cause skin thinning (atrophy), stretch marks, and acne with prolonged use, especially under occlusive dressings.

Serious Side Effects of Long-Term Hydrocortisone Use

Long-term, higher-dose hydrocortisone use carries more significant risks. Your doctor should monitor you regularly for these:

Osteoporosis: Corticosteroids decrease bone density over time. Patients on long-term therapy should receive bone density (DEXA) scans, calcium and vitamin D supplementation, and may need bisphosphonate treatment.

Adrenal suppression / adrenal crisis: Abruptly stopping hydrocortisone after extended use can cause adrenal insufficiency because the adrenal glands have reduced their own cortisol production. Never stop taking hydrocortisone without your doctor's guidance.

Cushingoid features: With excessive long-term dosing, some patients develop Cushing's syndrome features: moon face (facial rounding), buffalo hump (fat between the shoulders), and stretch marks.

Increased infection risk: Corticosteroids suppress the immune system. Patients on long-term therapy are more susceptible to bacterial, viral, and fungal infections, and infections may be harder to detect (because fever response is blunted).

Cataracts and glaucoma: Long-term systemic corticosteroid use is associated with posterior subcapsular cataracts and increased intraocular pressure. Annual eye exams are recommended.

Avascular necrosis: A rare but serious complication where bone tissue dies due to reduced blood supply. Most commonly affects the hip. Contact your doctor if you develop unexplained hip or joint pain.

Low potassium (hypokalemia): Particularly at higher doses, hydrocortisone can cause potassium levels to drop. Symptoms include muscle weakness, cramps, and irregular heartbeat.

When Should You Call Your Doctor?

Call your doctor right away if you experience:

Signs of adrenal crisis (severe fatigue, weakness, confusion, vomiting, low blood pressure, fainting) — call 911

Sudden severe hip or joint pain (possible avascular necrosis)

Signs of serious infection (high fever, severe worsening of any infection)

Significant blood sugar spikes (especially if diabetic)

Severe mood changes, depression, or thoughts of self-harm

Chest pain, shortness of breath, or irregular heartbeat

How to Minimize Side Effects

Take the largest dose in the morning and any additional doses before 2 pm to avoid insomnia

Always take hydrocortisone with food to reduce stomach irritation

Take the lowest effective dose for the shortest duration needed (for non-replacement use)

Get regular monitoring: blood glucose, blood pressure, bone density (if on long-term therapy), and electrolytes

Supplement with calcium and vitamin D if on long-term therapy to protect bone health

For information about medications and supplements that interact with hydrocortisone, see our guide on hydrocortisone drug interactions.