Drowsiness. Disturbed coordination, fatigue, restlessness, confusion, nervousness, blurred vision, tinnitus, tremor, irritability, epigastric distress, photosensitivity, dryness of mouth, nose & throat, excessive perspiration, drug rash & hypotension; haemolytic anaemia, agranulocytosis, headache, difficult urination & thickening of bronchial secretions.