Tell your doctor as soon as possible if you notice any of the following: • signs of infection • difficulty breathing and non-productive cough • problems with urination • changes in the way your heart beats, for example, if you notice it beating faster • light-headedness • tiredness • hoarseness • coughing • headache • signs of neurological problems: seizures, tingling or numbness in any part of your body, weakness in arms and/or legs, eye problems, changes in vision • signs of liver or spleen problems: eyes or skin turning yellow, dark-brown coloured urine, upper abdominal pain • loss of weight