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Potassium is critical for muscle and nerve function. Normal levels reflect good electrolyte balance.
Low potassium in horses can cause muscle weakness, lethargy, and cardiac arrhythmias. Common causes include diarrhea, excessive sweating, reduced feed intake, and use of diuretics (furosemide). Anorexia is a surprisingly common cause — when horses stop eating, their potassium intake drops dramatically.
Consult your veterinarian. Potassium supplementation may be needed, especially if your horse is anorexic or receiving IV fluids.
Equine potassium: 2.5 mEq/L (Low)Potassium is critical for muscle and nerve function. Normal levels reflect good electrolyte balance.
No action needed.
Equine potassium: 4.0 mEq/LHigh potassium can be life-threatening, causing cardiac arrhythmias and muscle weakness. Causes include kidney failure, urethral obstruction (rare in horses), noticeable muscle damage (rhabdomyolysis), or laboratory artifact from hemolysis. Hyperkalemic periodic paralysis (HYPP) is a genetic disorder in Quarter Horses and related breeds that causes episodic high potassium and muscle tremors.
This is a medical emergency. If your horse shows muscle tremors or weakness, seek immediate veterinary care. ECG monitoring may be needed.
Equine potassium: 5.8 mEq/L (High)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.