Cancer therapy is a latest way of treating the cancer that make use of drugs or other material substances to identify and invade on cancer cells, generally while little damage is happening to normal cells. Targeted medical care is manufacturing the expansion of the many cancer treatment regimens. Molecularly targeted therapy is one among the key modalities of medical treatment for cancer. The Drugs exerted by specific targeting genes. These genes are initiated in cancer cells or in cells linked to cancer growth, such as blood vessel cells. As arrangements of molecular medicine, targeted therapy blocks the evolution of cancer cells by interloping with specific targeted molecules required for carcinogenesis and tumour growth, instead of simply interfering with all rapidly dividing cells.