The most common side effects with CellCept used in combination with ciclosporin and corticosteroids (seen in more than 1 patient in 10) are sepsis (blood infection), gastrointestinal candidiasis (a fungal infection of the stomach or gut), urinary tract infection (infection of the structures that carry urine), herpes simplex (a viral infection that causes cold sores), herpes zoster (a viral infection that causes chickenpox and shingles), leucopenia (low white blood cell counts), thrombocytopenia (low blood platelet counts), anaemia (low red blood cell counts), vomiting, abdominal (tummy) pain, diarrhoea and nausea (feeling sick).