Prednisone Side Effects: Short-Term vs Long-Term Risks Explained

The prednisone side effects you experience depend heavily on how long you take the medication and at what dose. As a powerful corticosteroid used to treat everything from asthma and allergies to autoimmune diseases and cancer, prednisone side effects range from temporary nuisances during a short course to serious, potentially irreversible complications with long-term use.

Prednisone is one of the most commonly prescribed medications in the United States, with tens of millions of prescriptions written annually. According to the Cleveland Clinic, corticosteroids like prednisone are used to treat more than 100 different conditions by suppressing inflammation and calming an overactive immune system. While the drug can be remarkably effective, health authorities including the NIH note that its side-effect profile is extensive and dose-dependent, making it essential for patients to understand what to expect during both short and long treatment courses — and to work closely with the prescriber rather than adjusting the medication themselves.

This guide separates short-term from long-term side effects, explains who faces the greatest risks, and describes general, clinician-directed strategies for reducing complications. It deliberately does not include specific doses or taper schedules, because the right amounts depend entirely on your condition and must come from your own doctor. For more health information, visit our conditions guide.

Short-Term Prednisone Side Effects

Short-term prednisone use — often thought of as a brief course of roughly two weeks or less — carries a different risk profile than chronic use. Even brief courses can cause noticeable side effects, though these generally resolve after the medication is stopped under a clinician’s direction.

Increased appetite and weight gain. Prednisone can noticeably increase hunger, sometimes within the first day or two. Patients frequently report cravings, especially for carbohydrates and salty foods. Weight gain during a short course is usually modest and largely related to fluid retention and increased food intake.

Insomnia and sleep disturbances. Difficulty falling asleep or staying asleep is one of the most common short-term side effects, reported by a large share of patients in some studies. Prednisone stimulates the central nervous system in a way that can make it difficult to wind down at night. Many clinicians advise taking the medication earlier in the day rather than later to help with this — but follow the schedule your prescriber gives you.

Mood changes. Prednisone can cause a wide range of mood effects including euphoria, irritability, anxiety, agitation, and restlessness. Some patients describe feeling “wired” or emotionally volatile. These effects usually resolve within days of stopping the medication. A minority of patients experience more significant psychiatric effects — including severe mood swings, depression, or, rarely, psychosis — and these tend to be more likely at higher doses. Any severe mood change should be reported to a clinician promptly.

Elevated blood sugar. Prednisone raises blood glucose levels, even in people without diabetes. For people with diabetes, blood-sugar management becomes significantly more challenging during a prednisone course. The American Diabetes Association recommends closer blood-sugar monitoring and, where appropriate, medication adjustments made by the treating clinician during steroid therapy.

Elevated blood pressure and fluid retention. Prednisone causes the body to retain sodium and water, which can raise blood pressure and lead to puffiness — particularly in the face (sometimes called “moon face” with longer courses), hands, and ankles. This is usually temporary and resolves after the medication is stopped.

Increased energy and restlessness. Some patients feel unusually energetic or “jittery” during a prednisone course. While this can feel productive at first, it can also contribute to anxiety and insomnia.

Gastrointestinal irritation. Stomach upset and heartburn are common. Taking prednisone with food and avoiding alcohol can help protect the stomach lining. Persistent stomach pain or any sign of bleeding (see the warning box above) needs prompt medical attention.

Long-Term Prednisone Side Effects

Long-term prednisone use — generally thought of as more than about three months, or shorter periods at higher doses — carries more serious health risks. These effects are often dose-dependent and cumulative, which is one reason clinicians aim to use the lowest effective dose for the shortest necessary time.

Osteoporosis and fractures. This is one of the most significant long-term risks. Prednisone interferes with calcium absorption and bone formation, leading to loss of bone density. The American College of Rheumatology notes that bone loss can begin within the first few months of chronic steroid use and can lead to fractures, particularly of the spine and hips. Patients on long-term prednisone often need bone-density monitoring and, in some cases, preventive treatment — decisions your doctor will individualize.

Adrenal suppression. Long-term prednisone use suppresses the adrenal glands’ natural cortisol production. If the medication is stopped suddenly after chronic use, the body cannot produce enough cortisol on its own, potentially leading to adrenal crisis — a life-threatening emergency described in the warning box above. This is why long-term prednisone must always be reduced through a gradual, clinician-supervised taper rather than stopped abruptly.

Weight gain and metabolic changes. Chronic prednisone use can cause significant weight gain, redistribution of body fat to the face, neck, and abdomen, elevated cholesterol, and an increased risk of type 2 diabetes. These metabolic effects can persist for a time even after stopping the medication, though they typically improve gradually.

Increased infection risk. As an immunosuppressant, prednisone reduces the body’s ability to fight infections. Patients on long-term therapy are more susceptible to bacterial, viral, and fungal infections, and wound healing can be impaired. The CDC advises that immunocompromised patients may need modified vaccination schedules and should generally avoid live vaccines; your clinician can advise on timing.

Skin changes. Chronic use can cause thin, fragile skin that bruises easily, stretch marks (striae), acne, and slower wound healing. These changes are related to prednisone’s effects on collagen.

Cataracts and glaucoma. Long-term corticosteroid use increases the risk of posterior subcapsular cataracts and elevated intraocular pressure (glaucoma). The Mayo Clinic recommends regular eye exams for patients on chronic steroid therapy.

Muscle weakness. Steroid myopathy, a condition causing weakness in the hip and shoulder muscles, can develop with prolonged use. It typically improves after the dose is reduced or the medication is discontinued under medical supervision.

Avascular necrosis. High-dose or long-term prednisone can cause death of bone tissue (osteonecrosis), most commonly in the hip joint. Symptoms include progressive joint pain. This serious complication may ultimately require joint-replacement surgery.

If you are experiencing symptoms that may be related to cortisol effects from prednisone, our article on symptoms of high cortisol in females provides additional context.

Who Is at Higher Risk for Side Effects

Several factors increase susceptibility to prednisone side effects.

Patients on higher doses. Side-effect severity is closely correlated with dose. Higher doses carry substantially greater risks than low maintenance doses, and the Cleveland Clinic and others note that the risk of serious side effects rises meaningfully as the daily dose increases, particularly with chronic use. Your prescriber balances these risks against the benefit for your specific condition.

Older adults. Seniors face higher risks of osteoporosis-related fractures, cataracts, diabetes, and infections. Bone density may already be declining with age, and prednisone can accelerate this process.

People with diabetes. Prednisone significantly raises blood sugar, making glucose management much more difficult. People with diabetes may need medication adjustments during steroid therapy and should monitor blood sugar more frequently, as directed by their clinician.

Patients with existing bone-density issues. Postmenopausal women and anyone with existing osteopenia or osteoporosis face an elevated fracture risk with prednisone use.

Patients with mental-health conditions. Those with a history of depression, bipolar disorder, or psychosis may be more susceptible to the psychiatric side effects of prednisone. Mood monitoring is especially important for these patients.

Patients with active infections. Because prednisone suppresses the immune system, patients with active infections generally need careful medical assessment before use, and any decision is made by the treating clinician weighing the risks and benefits.

Managing Prednisone Side Effects

While some side effects are unavoidable at certain doses, several general strategies — best discussed with your own clinician — can reduce their severity. None of these should be used to change your prescribed regimen on your own.

Follow your prescribed timing. Many clinicians recommend taking the daily dose in the morning to better match the body’s natural cortisol rhythm and reduce insomnia. Take it exactly as your prescriber directs.

Take it with food. Taking prednisone with a meal or snack can reduce stomach irritation. Avoid alcohol, which compounds the gastrointestinal risks.

Mind your diet. Reducing sodium can help minimize fluid retention and blood-pressure effects. Emphasizing calcium-rich foods supports bone health, and limiting refined carbohydrates and sugary foods can help manage blood-sugar spikes and weight gain. Ask your doctor whether calcium and vitamin D supplements are appropriate for you, since the right choice depends on your diet, bone health, and other medications.

Stay active. Weight-bearing exercise helps protect bone density, manage weight, and support mood. Even moderate walking, light resistance training, or yoga can help. Check with your doctor about appropriate exercise during steroid therapy.

Protect your bones. If you will be on prednisone for an extended period, talk to your doctor about bone-density testing (a DEXA scan) and whether preventive therapy is appropriate. The American College of Rheumatology has specific guidelines for preventing glucocorticoid-induced osteoporosis that your clinician can apply to your situation.

Monitor blood sugar. Check blood sugar as advised if you have diabetes or prediabetes. Even people without diabetes on higher-dose or long-term prednisone should be aware of symptoms of high blood sugar, including increased thirst, frequent urination, and blurred vision.

Never stop abruptly. Always change or discontinue prednisone under your doctor’s guidance. After more than a short course, the medication must be tapered gradually to let your adrenal glands recover; the specific taper depends on your dose, how long you’ve been taking it, and your condition, so it must be individualized by your prescriber rather than copied from any general source.

When to Call Your Doctor

Contact your healthcare provider if you experience:

• Significant mood changes including severe anxiety, depression, or aggressive behavior
• Blood sugar readings consistently above your target range
• Signs of infection including fever, chills, persistent cough, or painful urination
• Vision changes including blurring or halos around lights
• Severe stomach pain or black, tarry stools (possible GI bleeding)
• Unusual bruising or wounds that are not healing
• Muscle weakness that affects your daily activities
• Bone or joint pain, especially in the hips
• Significant weight gain or facial swelling
• Swelling in the legs or ankles that worsens

Seek emergency care immediately for:

• Signs of adrenal crisis, especially after a missed or stopped dose: severe fatigue, weakness, nausea, vomiting, abdominal pain, dizziness or low blood pressure, and confusion
• A severe allergic reaction (trouble breathing, swelling of the face or throat)
• Suicidal thoughts or psychotic symptoms
• Severe abdominal pain with vomiting, or black/tarry stools with lightheadedness
• Signs of a serious infection (high fever, confusion, rapid breathing)
• Symptoms of very high blood sugar or diabetic ketoacidosis (extreme thirst, frequent urination, nausea, deep or rapid breathing, fruity-smelling breath, confusion)

Frequently Asked Questions

How long do prednisone side effects last after stopping?

Short-term side effects like insomnia, mood changes, and fluid retention typically resolve within one to two weeks of stopping the medication. Weight gained during short courses (mostly fluid) often comes off within a week or two. Long-term effects are different: bone-density loss can take months to years to recover, and some effects like cataracts do not reverse. Adrenal function can take weeks to months to recover after long-term use, which is why gradual, clinician-guided tapering is essential.

Does prednisone cause permanent weight gain?

Weight gained during short-term prednisone use is largely fluid and typically resolves quickly after stopping. Weight gained during chronic use includes actual fat deposition, particularly in the face, abdomen, and back of the neck (sometimes called a “buffalo hump”). This fat redistribution takes longer to resolve but generally improves over months after discontinuing or significantly reducing the dose under medical supervision. A healthy diet and regular exercise during therapy help minimize lasting weight effects.

Can you drink alcohol while taking prednisone?

The combination is generally not recommended. Both prednisone and alcohol irritate the stomach lining, increasing the risk of ulcers and GI bleeding. Alcohol also suppresses the immune system, compounding prednisone’s immunosuppressive effects, and can worsen mood changes and sleep disturbances. If you drink, discuss safe limits with your doctor.

Why does prednisone cause moon face?

Moon face (facial rounding) results from fat redistribution driven by corticosteroid effects. Prednisone mimics cortisol, and at higher doses it can prompt the body to deposit fat in the face, behind the neck, and in the abdomen while losing fat from the extremities — the same pattern seen in Cushing syndrome. Moon face typically develops after several weeks of moderate-to-high-dose prednisone and gradually resolves over weeks to months after the medication is reduced or stopped under medical guidance.

Is there a safer alternative to prednisone?

Depending on your condition, alternatives may include other corticosteroids with fewer systemic effects (such as budesonide for some inflammatory bowel disease), disease-modifying drugs (such as methotrexate for certain autoimmune conditions), biologic medications, or topical or inhaled steroids that have lower systemic absorption. Your doctor can discuss whether a steroid-sparing option is appropriate for your specific situation. In many cases, prednisone is used as a bridge therapy while slower-acting medications take effect.

Is it ever safe to stop prednisone on my own?

No — not after anything beyond a very short course, and you should never assume you know when it’s safe. Because prednisone suppresses your body’s own cortisol production, stopping suddenly can cause a dangerous adrenal crisis. Even if you feel better, or dislike the side effects, contact your prescriber before changing anything. If you run out of medication or can’t reach your doctor, seek medical care rather than simply stopping.

The Bottom Line

Prednisone is a powerful medication that provides rapid, effective anti-inflammatory and immunosuppressive action for many serious conditions. Short-term use is generally well tolerated despite bothersome effects like insomnia, mood changes, and increased appetite. Long-term use requires careful monitoring and proactive management of bone health, blood sugar, infection risk, and other potential complications.

The key to safe prednisone use is partnering closely with your doctor: use the lowest effective dose for the shortest appropriate duration, taper only under medical supervision when discontinuing, and watch for the warning signs described above throughout treatment. Never start, stop, or adjust prednisone on your own. This article is for general education and is not a substitute for personalized medical advice. For more health information, explore our conditions guide.

Sources

• Cleveland Clinic — Prednisone and corticosteroids (uses and side effects)
• Mayo Clinic — Prednisone and other corticosteroids: balancing risks and benefits
• National Institutes of Health / MedlinePlus — Prednisone drug information
• American College of Rheumatology — Guideline for the prevention and treatment of glucocorticoid-induced osteoporosis
• Centers for Disease Control and Prevention (CDC) — Vaccination of immunocompromised persons
• American Diabetes Association — Steroids and blood glucose management