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Beer Potomania
🍺 Beer Potomania ➝ A rare cause of dilutional hyponatraemia due to excessive beer intake (hypotonic, low solute). First described in 1972.
ℹ️ About
- 🍻 Associated with chronic or binge drinking of beer, which is very low in solute (Na, protein).
- ⚖️ Leads to water–solute imbalance ➝ kidney cannot excrete free water effectively.
- Results in dilutional hyponatraemia.
🧬 Aetiology
- 💧 Excess free water intake with insufficient solute load.
- ⬇️ Renal free water clearance ➝ serum sodium falls.
🧑⚕️ Typical Findings
- 📖 History of chronic or binge alcohol use (esp. beer).
- 🍽️ Low dietary solute/protein intake ➝ protein malnutrition.
- Seen in neglected nutrition, chronic alcoholics.
🩺 Clinical Features
- Symptoms of hyponatraemia:
- 😴 Lethargy
- 🤕 Headache
- ⚡ Seizures
- 😵💫 Coma (severe cases)
- 🚫 No other cause of hyponatraemia (exclude diuretics, adrenal insufficiency, hyperlipidaemia, etc).
🔬 Investigations
- 🧪 Serum electrolytes: low Na, Cl, K.
- 📉 Serum osmolality: low (<275 mOsm/kg).
- 💧 Urine osmolality: very low (<100 mOsm/L) ➝ reflects low solute load.
💊 Management
- 🚱 Fluid restriction: key to correcting dilutional hyponatraemia.
- 🥗 Nutritional support: protein & calorie repletion.
- 🧂 Hyponatraemia correction:
- Correct sodium slowly to avoid osmotic demyelination syndrome.
- Frequent monitoring of serum sodium.
- 💉 Vitamin support: give Pabrinex (thiamine/B vitamins) to prevent Wernicke’s encephalopathy.
- 🍷 Withdrawal management: consider chlordiazepoxide if alcohol withdrawal is likely.
📚 References
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