1 gram of NaCl tablet contains 17 mEq of sodium
One tablet of sodium chloride (NaCl) typically contains 1 gram (1000 mg), which equals approximately 17 mEq of sodium. This is the standard formulation for oral sodium chloride tablets used in clinical practice 1.
Understanding the Conversion
The calculation is straightforward:
- 1 gram NaCl = 1000 mg NaCl
- Since NaCl is 40% sodium by weight, 1 gram contains 400 mg of elemental sodium 2
- Converting to milliequivalents: 400 mg sodium ÷ 23 mg/mEq = 17.4 mEq (rounded to 17 mEq)
Clinical Context
The FDA-approved concentrated oral sodium chloride solution (23.4%) provides 4 mEq per mL 1. This means:
- A standard 4 mL dose delivers 936 mg of NaCl, which equals approximately 16 mEq of sodium
- This concentration is specifically designed for institutional use under physician direction
Important Considerations
Common tablet formulations:
- Standard oral NaCl tablets are typically 1 gram (1000 mg) each
- Some formulations come as 500 mg tablets (approximately 8.5 mEq)
- Always verify the specific tablet strength before prescribing or administering
Clinical applications:
- Used for hyponatremia treatment 3
- Employed in hyperhydration protocols 4
- Utilized in patients with high stomal losses requiring sodium supplementation 5
The key is to always check the specific tablet formulation being used, as strengths can vary between manufacturers and clinical settings.