USMLE Prep - Medical Reference Library

Acute Gout Flare — NSAIDs, Colchicine, Corticosteroids, and When to Start ULT

System: Internal Medicine • Reviewed: Sep 2, 2025 • Step 1Step 2Step 3

Synopsis:

Treat acute gout with NSAIDs, colchicine, or corticosteroids (intra-articular or systemic). Exclude septic arthritis when uncertain. Start urate-lowering therapy after flares are controlled in patients with tophi, frequent flares, or CKD; provide flare prophylaxis during ULT initiation.

Key Points

  • Use the highest‑yield diagnostic test early; do not let testing delay time‑critical therapy.
  • Set objective targets and reassess frequently.
  • Plan definitive source control or disease‑specific therapy when indicated; document follow‑up and patient education.

Algorithm

  1. Treat flare promptly with NSAIDs/colchicine/steroids; rule out septic arthritis when needed.
  2. Identify indications for ULT; start after flare control; add prophylaxis (colchicine/NSAID) for 3–6 months.
  3. Titrate ULT to urate target; lifestyle counseling and comorbidity management.

Clinical Synopsis & Reasoning

Treat acute gout with NSAIDs, colchicine, or corticosteroids (intra-articular or systemic). Exclude septic arthritis when uncertain. Start urate-lowering therapy after flares are controlled in patients with tophi, frequent flares, or CKD; provide flare prophylaxis during ULT initiation.


Treatment Strategy & Disposition

Stabilize ABCs. Initiate guideline‑concordant first‑line therapy with precise dosing and continuous monitoring. Escalate to advanced/procedural interventions based on explicit failure criteria. Define ICU, step‑down, and ward disposition triggers; involve specialty teams early.


Epidemiology / Risk Factors

  • Risk varies by comorbidity and precipitants; see citations for condition‑specific data.

Investigations

TestRole / RationaleTypical FindingsNotes
Arthrocentesis with crystal analysis (if uncertain)DiagnosisNegatively birefringent monosodium urate crystalsExclude infection
Serum urate (baseline)MonitoringTarget <6 mg/dL (<5 if tophaceous)Guide ULT
Renal function and drug interactionsSafetyDosing/choice constraints

High-Risk & Disposition Triggers

TriggerWhy it mattersAction
Septic arthritis not excludedJoint destructionArthrocentesis; cultures
CKD/anticoagulationDrug limitsPrefer steroids; adjust colchicine

Pharmacology

Medication/InterventionMechanismOnsetRole in TherapyLimitations
NSAIDs (e.g., indomethacin/naproxen)COX inhibitionHoursFirst-line if no contraindicationsGI/renal risks
Colchicine 1.2 mg then 0.6 mg 1 h later (then 0.6 mg BID)Microtubule inhibitorHoursEarly within 36 hDrug interactions (CYP3A4/P-gp)
Corticosteroids (PO/IA/IM)Anti-inflammatoryHoursIf NSAIDs/colchicine unsuitableHyperglycemia risk
Allopurinol/Febuxostat for ULT (after flare control) + prophylaxisXO inhibitorsDays-weeksPrevent flares and tophiHLA-B*58:01 in high-risk groups

Prognosis / Complications

  • Outcome depends on timeliness of diagnosis and definitive therapy; monitor for complications.

Patient Education / Counseling

  • Provide red‑flag education, adherence guidance, and explicit return precautions; arrange timely specialty follow‑up.

References

  1. ACR guideline on gout management — Link