Cisplatin, cis-[Pt(NH3)2Cl2], is a widely used antitumor agent for the treatment of testicular and ovarian cancers. Carboplatin is used extensively for small cell, non small cell lung cancer and ovarian cancer. Oxaliplatin has recently been approved in the US for treatment of colorectal cancer. All of these analogues are administered by intravenous injection, and within one day, 65-98% of the platinum in the blood plasma is bound to protein. Binding of cisplatin to proteins reduces urinary excretion of platinum, and causes deposition of platinum in tissues. Binding of cisplatin to proteins and enzymes is generally believed to be the cause of several severe side effects exhibited by these drugs, especially ototoxicity and nephrotoxicity.