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+**Insulin is used to correct hyperkalaemia.**
+  *Hyperkalaemia is increased plasma potassium level above normal range in extracellular fluid. There is increased membrane excitability, which leads to ventricular arrhythmia and ventricular fibrillation.
+  *Administration of iv insulin activates Na+- K+ ATPase pump and causes redistribution of K+ from extracellular into the cells by Na+-K+ ATPase pump.
+  This pump moves:
+     *3 Na⁺ out of the cell
+     *2 K⁺ into the cell
+    *Potassium shifts from extracellular fluid (plasma) into cells, lowering serum K⁺.
+Thus is used to correct hyperkalaemia