Fluorouracil interferes with the growth of skin cells. Fluorouracil works by causing the death of cells which are growing fastest, such as abnormal skin cells. Fluorouracil topical (for the skin) is used to treat scaly overgrowths of skin (actinic or solar keratoses). Fluorouracil topical may also be used in the treatment of superficial basal cell carcinoma. Fluorouracil topical may also be used for purposes not listed in this medication guide.
Carac is indicated for the treatment of basal cell cancer of skin and actinic keratoses, which is a precancerous skin condition. Carac's anticancer properties help in fighting the cancer cells and preventing them from dividing. In cancerous tumors, the cells divide in an uncontrolled way unlike in normal tissues. Cancer cells do not go through the usual checks and balances that limit cell division. In normal cells, they stop to divide when they get in contact with other cells in a mechanism referred to as contact inhibition. During cell division, the cells should produce DNA in each new cell. The production of the DNA is largely dependent on the synthesis of RNA material that acts as the messenger at the time of production of DNA. Carac works to prevent the formation of RNA thus preventing the formation of DNA, and this means that cells cannot multiply.