General side effects: decreased or irregular heart rate, reduced heart function, chest pain, asthma, difficulty breathing, shortness of breath, decreased red blood cell count in blood, increased chlorine level in blood, dizziness, drowsiness, difficulty with memory, depression, difficulty sleeping, nervousness, irritability, fatigue, generalized weakness, feeling abnormal, pain, shaking, ringing in ears, decreased sex drive, male sexual difficulty, cold symptoms, chest congestion, cough, sinus infection, throat irritation, abnormal or decreased sensation in mouth, inflammation of the lining of the oesophagus, abdominal pain, nausea, upset stomach, frequent bowel movements, diarrhoea, intestinal gas, digestive disorder, kidney pain, muscle pain, muscle spasms, back pain, nose bleeds, dry nose, runny nose, stuffy nose, sneezing, rash, abnormal skin sensation, itching, loss of hair