Displaying 9 results of Trametinib Impurities Trametinib is a drug used to treat melanoma, a type of skin cancer. Trametinib impurities are other chemicals that are present in the drug in small amounts. These impurities can affect the efficacy and safety of the drug, and therefore need to be carefully monitored and controlled. The identification and quantification of trametinib impurities is an important aspect of drug development and quality control.