Very common side effects Infections (including bacterial, viral and fungal) Heart and lungs: shortness of breath, cough Digestive problems: diarrhoea, feeling or being sick (nausea, vomiting) Skin, hair, eye, general: skin rash, fever, swelling around hands and feet, headache, feeling tired or weak, bleeding Pain: pain in the muscles, abdominal (tummy) pain Tests may show: low blood platelet count, low white blood cells count (neutropenia), anaemia, fluid around the lungs