Typically non-specific
Muscle weakness
Lethargy, fatigue
Paresthesias
Nausea and Vomiting
Difficulty breathing
Palpitations, chest pain
Hyperkalemia
Pseudohyperkalemia: hemolyzed specimen, prolonged tourniquet use prior to blood draw, thrombocytosis or leukocytosis
Hyponatremia
Redistribution 
Hypernatremia
Acidemia 
Hypokalemia
Cellular breakdown: see Rhabdomyolysis/Crush syndrome, electrical/thermal burn, hemolysis, see Tumor lysis syndrome