• if you have had a history of angiooedema (swelling of the face, lips, throat, and/ or tongue) (see also section 4 ‘ Possible side effects’), • if you suffer from excessive vomiting or diarrhoea leading to an extreme loss of fluid and/ or salt in your body, • if you receive diuretics (medicines that increase the amount of water that you pass out through your kidneys) or are under dietary salt restriction leading to an extreme loss of fluid and salt in your body (see section 3 ‘ Dosage in special patient groups’), • if you are known to have narrowing or blockage of the blood vessels leading to your kidneys or if you have received a kidney transplant recently, • if your liver function is impaired (see sections 2 "Do not take Losartan" and 3 ‘ Dosage in special patient groups’), • if you suffer from heart failure with or without renal impairment or concomitant severe life threatening cardiac arrhythmias.