## Drug of Choice for Xerophthalmia Management **Key Point:** Vitamin A palmitate (or acetate) in high-dose oral or IM regimens is the gold standard for treating xerophthalmia, particularly in children with corneal involvement or risk of progression to corneal scarring. ### Dosing Regimen for Xerophthalmia | Stage | Recommended Regimen | Route | Rationale | |-------|-------------------|-------|----------| | Night blindness / Bitot's spots | 200,000 IU on days 1, 2, and 15 | Oral | Rapid repletion of hepatic stores | | Corneal involvement (X1B, X2, X3) | 200,000 IU on days 1, 2, and 15 | Oral or IM | Prevents irreversible scarring | | Severe malnutrition / malabsorption | 200,000 IU IM on days 1, 2, and 15 | Intramuscular | Bypasses GI absorption issues | **High-Yield:** The WHO and Indian Academy of Ophthalmology recommend the **200,000 IU × 3 dose regimen** (days 1, 2, and 15) for all xerophthalmia cases in children. This achieves rapid repletion of depleted hepatic stores and prevents progression to corneal scarring. ### Why This Regimen Works 1. **Rapid hepatic repletion:** Three high doses restore liver vitamin A within 2 weeks, preventing further deterioration. 2. **Prevention of corneal scarring:** Early, aggressive dosing halts progression from conjunctival to corneal disease. 3. **Proven efficacy:** RCTs show 50% reduction in mortality and blindness with this regimen compared to lower-dose schedules. **Clinical Pearl:** Bitot's spots (foamy, triangular conjunctival patches) indicate moderate xerophthalmia (stage X1B) and warrant immediate high-dose vitamin A to prevent corneal involvement. **Mnemonic — WHO Xerophthalmia Dosing:** **"Day 1, Day 2, Day 15"** — remember the three-dose schedule for all stages except night blindness alone (which may use lower doses in some protocols, but high-dose is safer and preferred in children).
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