54  decrease of level of haemoglobin and decrease of the percentage of red blood cells in the blood (which can, in severe cases, lead to anaemia)  increase of level of potassium in the blood (which can, in severe cases, trigger muscle spasms, abnormal heart rhythm)  elevation of liver function values (which can indicate liver damage) including an increase of bilirubin in the blood (which can, in severe cases, trigger yellow skin and eyes)  increase of level of blood urea nitrogen and increase of level of serum creatinine (which can indicate abnormal kidney function)