Uncommon: • somnolence, • headache, • sleep disorders, • feeling of increased heart rate (palpitations), • severe chest pain (angina pectoris), • low blood pressure (especially after excessive loss of water from the body within blood vessels e. g. in patients with severe heart failure or under treatment with high dose diuretics), • dose-related orthostatic effects such as lowering of blood pressure appearing when rising from a lying or sitting position, • shortness of breath (dyspnoea), • abdominal pain, • obstipation, • diarrhoea, • nausea, • vomiting, • hives (urticaria), • itching (pruritus), • rash, • localised swelling (oedema).