Side Effects :
. headache, dizziness, sleepiness (especially at the beginning of treatment)
. palpitations (awareness of the heart beat), flushing
. abdominal pain, feeling sick (nausea)
. ankle swelling (oedema), tiredness
. low blood pressure
. debility
. fatigue
. too less sugar in the blood (hypoglycaemia)
. too much potassium in the blood (hyperkalaemia)
. changes in kidney function including kidney failure
. reduced number of red blood cells (anaemia)
. increase in blood urea, serum creatinine and serum potassium in patients with heart failure