Capecitabine: effective oral fluoropyrimidine chemotherapy.

Fluoropyrimidine chemotherapy, principally with 5-fluorouracil (5-FU), has been a standard of care for a range of solid tumours for many years. Capecitabine, a precursor of 5-FU, is an oral fluoropyrimidine cytotoxic agent developed with the aim of providing a more effective, less toxic alternative to 5-FU, with the added advantage of oral administration. In clinical trials, capecitabine has proven to be an effective substitute for 5-FU in colorectal and breast cancer, and has become an accepted standard treatment in these tumours, both as a single agent and as a component of combination chemotherapy. It is also effective in a number of other solid tumours and as a radiosensitising agent. Capecitabine has significantly less serious toxicity than 5-FU when used alone or in combination with other cytotoxic agents. It has been shown to be resource saving in comparison with accepted standard comparator regimens in breast and colorectal cancer. Ongoing and future clinical trials will continue to examine, and are likely to expand, the role of capecitabine in the treatment of breast and colorectal cancer, as well as a number of other malignancies, both in the advanced palliative and adjuvant curative settings. This will involve the use of capecitabine as a single agent and increasingly in combination with other new anticancer agents.