Increase in blood levels of nitrogen or urea especially those w/ impaired kidney function, altered numbers & types of blood cells. Low blood levels of Na, changes in the levels of chemicals in the body. Lack of muscle coordination, drowsiness, dizziness, headache, clumsiness; tiredness; inflammation of the stomach lining, bleeding, stomach or intestinal ulcers, stomach cramps, diarrhoea, being sick; skin rashes including pale or red irregular raised patches w/ severe itching (hives), hair loss; bone softening due to vit D deficiency; acute kidney failure in those who already have impaired kidney function; enlarged breast in men, changes in voice pitch, reduced sexual potency in men, decreased sexual ability, breast tenderness & increased hair growth in females, irregular periods, sweating.