International Drug Mart

Dexamethasone vs Prednisone

Dexamethasone vs Prednisone
Dexamethasone
Prednisone

Drug Class

Corticosteroid (Glucocorticoid)
Corticosteroid (Glucocorticoid)

Potency

About 25–30 times more potent than cortisol
About 4–5 times more potent than cortisol

Half-Life

36–72 hours (long-acting)
18–36 hours (intermediate-acting)

Onset of Action

1–2 hours
1–2 hours

Duration of Action

36–72 hours
18–36 hours

Indications

Severe allergic reactions, Inflammatory diseases, Cerebral edema, Cancers (e.g., leukemia, lymphoma),COVID-19 (severe cases), Shock due to adrenal insufficiency
Allergic conditions-Autoimmune disorders-Inflammatory conditions-Rheumatoid arthritis-Asthma, COPD-Organ transplantation (to prevent rejection)

Administration Routes

Oral, IV, IM, topical, intravitreal
Oral, IV, IM

Dosage Equivalence

0.75 mg of dexamethasone ? 5 mg of prednisone
5 mg of prednisone ? 0.75 mg of dexamethasone

Common Side Effects

Insomnia - Hyperglycemia - Mood changes - Increased risk of infection - Fluid retention (less common)-
Weight gain - Hyperglycemia - Mood changes - Increased risk of infection- Fluid retention (more common)

Contraindications

Active infections-Untreated systemic fungal infections-Known hypersensitivity
Active infections - Untreated systemic fungal infections - Known hypersensitivity

Drug Interactions

CYP3A4 inducers (reduce effectiveness) - NSAIDs (increased GI risk)
CYP3A4 inducers (reduce effectiveness)-NSAIDs (increased GI risk)

Pregnancy Category

C (Risk cannot be ruled out; use only if benefits justify)
C (Risk cannot be ruled out use only if benefits justify)

Cost

Typically more expensive
Generally less expensive

Special Considerations

Preferred for conditions requiring strong, long - lasting effects - Not ideal for long - term use due to high potency
Preferred for tapering or conditions needing less potency-Often used in tapering regimens
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Frequently Asked Questions

What is the difference between Dexamethasone and Prednisone?

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Dexamethasone is a long-acting steroid with stronger anti-inflammatory effects, while Prednisone is intermediate-acting and milder. Doctors often choose Dexamethasone for severe conditions and Prednisone for everyday inflammatory issues like asthma or arthritis.

Which is stronger: Dexamethasone or Prednisone?

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Dexamethasone is more potent about 6 to 7 times stronger than Prednisone. This means lower doses of Dexamethasone can produce similar or stronger effects. However, this also means a higher risk of side effects if not used properly.

Can I switch from Prednisone to Dexamethasone?

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Yes, but only under medical guidance. These steroids differ in strength and duration, so switching requires dose adjustment. Your doctor will ensure the correct conversion to avoid underdosing or overdosing.

What are the side effects of Dexamethasone vs Prednisone?

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Both may cause weight gain, mood swings, high blood sugar, and trouble sleeping. Dexamethasone's longer action may increase risk with long-term use. Prednisone is often preferred for short-term or lower-intensity treatment plans.

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