Estimate phosphate replacement needs. Approximate — individualize and monitor electrolytes.
| Formulation | Phosphorus | Potassium (K⁺) | Sodium (Na⁺) |
|---|---|---|---|
| K-Phos Neutral (tab) | 8 mmol (250 mg) | 1.1 mEq K⁺ (45 mg) | 13 mEq Na⁺ (298 mg) |
| Phos-NaK / Neutra-Phos (pkt) | 8 mmol (250 mg) | ~7 mEq K⁺ (280 mg) | ~7 mEq Na⁺ (160 mg) |
| Potassium phosphate IV | 3 mmol/mL (93 mg/mL) | 4.4 mEq/mL K⁺ (170 mg/mL) | — |
| Sodium phosphate IV | 3 mmol/mL (93 mg/mL) | — | 4 mEq/mL Na⁺ (92 mg/mL) |
Conversion: 1 mmol phosphorus ≈ 31 mg. Serum mg/dL × 0.323 ≈ mmol/L.
IV phosphate must be diluted and infused slowly. Monitor calcium, potassium, and phosphate.
Oral preferred when GI function is intact and deficit is not severe. Always individualize.