78 b) If you are being treated for rheumatoid arthritis Some other less frequent effects might occur, including: pain in the tummy, back, chest, muscles and/or joints, at the infusion site (where the drip is put into your vein), feeling unwell, changes in blood pressure, changes in heart rate, diarrhoea, indigestion, cramp, dizziness, tingling or numbness, anxiety or nervousness, cough, watery or itchy eyes, runny or itchy nose, sweating, sinusitis.