Hypokalemia has a wide variety of presentations ranging from generalized weakness, to paralysis, to cardiac arrhythmia or cardiac arrest.
When you discover hypokalemia, be sure to check and EKG. Think about underlying causes of hypokalemia, because it is rarely a solo event.
Treat with oral potassium supplementation of 40-60 orally every 4-6 hours for mild hypokalemia and 10-20 mEq/hour IV for severe or symptomatic hypokalemia.