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Erythema Nodosum

Medication (Drugs)

First Line

  • Medication usually more effective after initial onset vs. with chronic disease
  • Condition often self-limited
  • NSAIDs:
    • Indomethacin: 75–150 mg/d, divided t.i.d.
    • Naproxen (Naprosyn): 500–1,000 mg/d, divided b.i.d.
    • Aspirin: 325 mg 8–12 times per day; use enteric-coated to decrease GI upset. Titrate to blood levels.
  • Contraindications:
    • Active or recent peptic ulcer disease
    • History of hypersensitivity to NSAIDs
  • Precautions:
    • GI upset/bleeding
    • Fluid retention
    • Dose reduction in elderly, especially those with renal disease, diabetes, or heart failure
    • May mask fever
    • NSAIDs may elevate liver function tests
  • Significant possible interactions:
    • May blunt antihypertensive effects of diuretics and β-blockers
    • NSAIDs can elevate plasma lithium levels.
    • Caution advised with naproxen or any highly protein-bound drug, because it may compete for albumin binding and elevate levels
  • NSAIDs can cause significant elevation and prolongation of methotrexate levels.

Second Line
  • Potassium iodide 400–900 mg/d, divided 2–3 times a day for 3–4 weeks (for persistent lesions)
  • Corticosteroids for severe, refractory cases
  • Recent reports of improvement with colchicine 0.6–1.2 mg b.i.d.

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