For metastatic cancer of the colon or rectum, Erbitux was studied in five main studies: • two studies involved 1,535 patients who had not received chemotherapy before, looking at the effects of adding Erbitux to a treatment combination containing either irinotecan or oxaliplatin; • three studies involved 2,199 patients whose disease had got worse while they were on previous treatment including irinotecan, oxaliplatin or both, or who could not receive these medicines.