Secondary Prophylaxis of Rheumatic Fever
Secondary prophylaxis aims to prevent recurrent attacks of Acute Rheumatic Fever (ARF) and the subsequent development or worsening of Rheumatic Heart Disease (RHD).
1. Recommended Regimens (AHA/WHO Guidelines)
| Agent | Dosage/Frequency |
|---|---|
| Benzathine Penicillin G | 1.2 million units IM every 3–4 weeks (1st line). |
| Phenoxymethyl Penicillin | 250 mg PO BID (Alternative). |
| Sulfadiazine / Macrolides | Used only in patients with severe penicillin allergy. |
2. Duration of Prophylaxis (Crucial NEET PG Data)
| Patient Category | Duration |
|---|---|
| ARF without Carditis | 5 years or until age 21 (whichever is longer). |
| ARF with Carditis (No Residual Damage) | 10 years or until age 21 (whichever is longer). |
| ARF with Residual Heart Disease | 10 years or until age 40 (sometimes lifelong). |
3. High-Yield Clinical Pearls
- Primary Prevention: Always treat Group A Streptococcal pharyngitis within 9 days to prevent initial ARF.
- Compliance: IM Benzathine Penicillin is the gold standard because it ensures adherence, which is the most critical factor in preventing recurrences.
- Diagnosis: Remember the Modified Jones Criteria (2 major or 1 major + 2 minor + evidence of recent GAS infection).
NEET PG Hint: Remember: Benzathine Penicillin G every 3–4 weeks is the drug of choice for secondary prophylaxis. For more high-yield pediatric protocols and free medical questions, visit mymedschool.org.