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What Is Prednisone?

Prednisone is a prescription corticosteroid used to reduce inflammation and suppress immune system activity. It is prescribed for numerous conditions, including severe allergies, certain autoimmune disorders, asthma exacerbations, and inflammatory diseases. Prednisone is generally taken orally as tablets or liquid formulations. After administration, the liver converts prednisone into prednisolone, its active form. Prednisone can reduce symptoms during inflammatory flare-ups and may be used for longer treatment courses in selected conditions. The dose and duration depend on the medical diagnosis and individual response.

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What Is Prednisone?

Prednisone is a prescription corticosteroid used to reduce inflammation and suppress immune system activity. It is prescribed for numerous conditions, including severe allergies, certain autoimmune disorders, asthma exacerbations, and inflammatory diseases. Prednisone is generally taken orally as tablets or liquid formulations. After administration, the liver converts prednisone into prednisolone, its active form. Prednisone can reduce symptoms during inflammatory flare-ups and may be used for longer treatment courses in selected conditions. The dose and duration depend on the medical diagnosis and individual response.

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How Does Prednisone Work?

Prednisone is converted into prednisolone, which binds to glucocorticoid receptors and changes gene activity involved in immune and inflammatory responses. This reduces the production of several inflammatory mediators and suppresses the activity of certain immune cells. These effects can decrease swelling, redness, and other inflammation-related symptoms. Prednisone also affects metabolism, glucose regulation, and the body's response to physical stress. It does not directly treat bacterial infections and can weaken the body's ability to control certain infections. Its benefits and risks increase with higher doses and longer exposure.

What Conditions Does Prednisone Treat?

Prednisone is used for a wide range of corticosteroid-responsive conditions. These include certain rheumatic disorders, systemic lupus erythematosus, severe allergic reactions, asthma exacerbations, inflammatory skin diseases, and selected blood, lung, kidney, and gastrointestinal disorders. It is also used in specific cancer-related treatment regimens and certain endocrine conditions. The need for prednisone depends on the diagnosis, severity, and availability of other treatments. It is not appropriate for every infection or inflammatory symptom. Patients with systemic fungal infections generally should not receive prednisone unless a specific exception is medically justified.

How Should Prednisone Be Taken?

Prednisone is taken orally according to an individualized treatment schedule. Initial adult doses may range from 5 mg to 60 mg daily depending on the condition, although certain medical situations require different regimens. Many prescriptions are taken with food to reduce stomach discomfort. Some patients receive a single morning dose, while others follow divided-dose or tapering schedules. Treatment length can range from a short course to longer maintenance therapy. Patients should not change the dose independently or abruptly stop prednisone after prolonged use. A clinician determines whether gradual tapering is necessary.

What Are the Side Effects and Warnings of Prednisone?

Common adverse effects include increased appetite, difficulty sleeping, mood changes, fluid retention, and elevated blood sugar. Higher doses or prolonged treatment can cause adrenal suppression, osteoporosis, muscle weakness, cataracts, glaucoma, and increased infection risk. Prednisone can also contribute to high blood pressure, gastrointestinal complications, and significant psychiatric reactions. Live vaccines may be inappropriate during immunosuppressive treatment. Patients should report persistent fever, severe mood changes, black stools, sudden visual disturbances, or unusual weakness. Stopping prednisone suddenly after prolonged treatment can trigger adrenal insufficiency.

Common Questions About Prednisone

Is prednisone a steroid medication?

Yes. Prednisone is a systemic corticosteroid used to reduce inflammation and suppress immune activity in selected medical conditions.

Can prednisone cause weight gain?

Yes. Prednisone can increase appetite and cause fluid retention, contributing to weight gain, particularly with higher doses or longer treatment.

Can prednisone affect eyesight?

Yes. Prolonged systemic corticosteroid use can contribute to cataracts, glaucoma, and other eye complications. New visual changes should be evaluated by an eye care professional.

Why should prednisone not be stopped abruptly?

Prolonged prednisone use can suppress the body's normal cortisol production. Stopping suddenly can cause adrenal insufficiency, so some patients need a supervised taper.

References

DailyMed - PREDNISONE tablet. https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=f76db82a-826e-92b0-e053-6294a90a8ec6. Date Accessed November 2, 2026.

Prednisone. MedlinePlus. https://medlineplus.gov/druginfo/meds/a601102.html. Date Accessed November 2, 2026.

Prednisone. PubChem. https://pubchem.ncbi.nlm.nih.gov/compound/Prednisone. Date Accessed November 2, 2026.

Prednisone. StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK534809/. Date Accessed November 2, 2026.

Prednisone Tablets. Cleveland Clinic. https://my.clevelandclinic.org/health/drugs/20469-prednisone-tablets. Date Accessed November 2, 2026.