Uncommon effects, seen in more than 1 out of 1,000 patients but less than 1 in 100 patients, include low levels of potassium in the blood, gout, increased thirst, nightmares, forgetfulness (amnesia), emotional instability, tremor, muscle stiffness, increased tear production, abnormal intolerance to light, ringing in the ears (tinnitus), heart flutters, angina pectoris, an increase or slowing of the heart rate, heart attack, low blood pressure especially on getting up from a sitting or lying position, reduced blood supply to the limbs, dizziness on standing (syncope), nose bleeds, tightening of the chest, cough, throat inflammation, lack of appetite or increased appetite, taste disturbances, hair loss, swelling of the face and joints, muscle pain, swelling of joint and pain (arthralgia), muscle weakness, incontinence, difficulty with or pain on urinating, flushing, fever (shivers) and loss of colour.