Prednisone 1‑50 mg Tablets and Intensol Concentrate: The Most Commonly Prescribed Oral Corticosteroid for Autoimmune, Inflammatory, Allergic, and Oncological Conditions

Information last reviewed: May 2026 — for educational purposes only.

Prednisone is the most widely prescribed oral corticosteroid in the United States and one of the most prescribed medications overall — used across virtually every medical speciality for its potent anti-inflammatory and immunosuppressive properties. It is a prodrug: prednisone itself is pharmacologically inert and must be converted in the liver by 11-beta-hydroxysteroid dehydrogenase (11β-HSD1) to its active form, prednisolone, before it can bind glucocorticoid receptors and exert its effects. In patients with normal hepatic function, this conversion is rapid and nearly complete, so prednisone and prednisolone are clinically interchangeable at equivalent doses. Prednisone is approximately 4–5× more potent than cortisol in anti-inflammatory activity and has moderate mineralocorticoid activity (less than hydrocortisone).

Prednisone is prescribed for an extraordinary breadth of conditions: severe allergic reactions (contact dermatitis, poison ivy/oak), asthma and COPD exacerbations, autoimmune diseases (rheumatoid arthritis, lupus, vasculitis, inflammatory bowel disease, polymyalgia rheumatica), dermatologic conditions (severe psoriasis, pemphigus), neurological indications (Bell's palsy, increased intracranial pressure, MS exacerbation), transplant rejection prevention, haematological malignancies (CLL, lymphoma — CHOP, R-CHOP regimens), and many others. Few pharmaceutical agents span such a wide therapeutic territory.

What Is Prednisone?

Prednisone acts via the nuclear glucocorticoid receptor pathway — the receptor-ligand complex (after prodrug conversion to prednisolone) translocates to the nucleus, binds to glucocorticoid response elements (GREs) on DNA, and modulates hundreds of genes. Key anti-inflammatory effects include downregulation of cyclooxygenase-2 (COX-2), phospholipase A2, cytokines (IL-1, IL-2, IL-6, TNF-α), and cell adhesion molecules. Immunosuppression involves reduced T-cell activation, lymphocyte redistribution, and decreased antibody production. The biological half-life (12–36 hours) allows once-daily dosing; taking the dose in the morning aligns with the body's natural cortisol circadian peak and minimises sleep disruption from stimulant-like effects.

Prescription Status

Prednisone is prescription-only in the United States. It is not available OTC. Despite its broad utility, its significant side effect profile at any dose above physiological levels demands physician oversight for appropriate indication, dose, duration, and tapering plan.

Strengths and Available Forms

• Prednisone 1 mg tablet — fine dose adjustment for chronic low-dose therapy; polymyalgia rheumatica tapering (e.g. reducing from 5 mg to 4 mg by alternating 5 mg and 4 mg days)
• Prednisone 2.5 mg tablet
• Prednisone 5 mg tablet — standard workhorse dose unit; equivalent to approximately 4 mg methylprednisolone, 0.75 mg dexamethasone
• Prednisone 10 mg tablet
• Prednisone 20 mg tablet — high-dose short-course treatment (e.g. 60 mg/day = 3 × 20 mg)
• Prednisone 50 mg tablet — for highest doses in severe conditions; reduces pill burden
• Prednisone Intensol 5 mg/mL oral concentrate — concentrated liquid for patients requiring very high doses or who cannot swallow tablets; calibrated dropper provided; mix with liquid or semi-solid food; refrigerate after opening

Common short-course dosing for acute conditions: 40–60 mg/day for 5–10 days, then stop or taper depending on indication and duration. Tapering: for courses of more than 2 weeks, doses are reduced by approximately 10% per week (or 5 mg per week at doses below 40 mg/day) to allow HPA axis recovery.

Price of Prednisone Tablets

Generic prednisone tablets in all strengths are among the least expensive medications in existence — typically $4–10 for a full 30-day supply at discount pharmacies. No brand-name product is competitive with generic pricing. Insurance copays are minimal. The Intensol concentrate is slightly more expensive per mg but still low cost.

Frequently Asked Questions

Why must prednisone be tapered and when is it safe to stop abruptly?

Extended prednisone use suppresses the hypothalamic-pituitary-adrenal (HPA) axis — the brain and adrenal glands detect elevated exogenous corticosteroid levels and reduce endogenous ACTH and cortisol production. When prednisone is stopped abruptly after sustained suppression, the adrenal glands cannot immediately resume cortisol production — leading to adrenal insufficiency: fatigue, dizziness, hypotension, nausea, myalgia, and potentially life-threatening adrenal crisis. Tapering allows gradual dose reduction, giving the HPA axis time to recover. For short courses ≤2 weeks at any dose, or doses below 20 mg/day for <3 weeks in otherwise healthy adults, abrupt discontinuation is generally safe. For longer courses (>3 weeks) or higher doses, taper is required. The duration and steepness of the taper depend on the length and dose of the course preceding it.

What common side effects should patients expect on a short 5–10 day course?

Even brief prednisone courses cause predictable temporary effects in many patients: elevated blood glucose (significant in diabetics — blood glucose monitoring more frequent; may require insulin adjustment); insomnia (take as morning dose); increased appetite and weight (fluid retention from residual mineralocorticoid activity); mood changes — often euphoria or anxiety; GI irritation (take with food); and facial flushing. These effects resolve when the course ends. Short-course prednisone does not cause meaningful bone loss, significant HPAaxis suppression, or cataracts — these are concerns only with prolonged use.

Can prednisone be taken with food?

Yes — prednisone should preferably be taken with food to reduce GI irritation (nausea, stomach pain). Unlike some medications where food substantially reduces absorption, food does not significantly reduce prednisone's overall bioavailability — it only slightly delays the time to peak plasma concentration by a modest amount that is clinically irrelevant for most indications. Taking prednisone on an empty stomach is associated with more frequent GI side effects including nausea and gastritis. For patients on long-term prednisone, co-prescribing a proton pump inhibitor (omeprazole, pantoprazole) is recommended to reduce GI ulcer risk, particularly if concurrent NSAIDs or aspirin are used.

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