Used in cancer treatment, particularly for melanoma with BRAF V600E or V600K mutations. Works as a MEK inhibitor, blocking the activity of the MEK enzyme in the RAS/RAF/MEK/ERK signaling pathway, which controls cell division and survival. By inhibiting this pathway, it helps slow or stop the growth of cancer cells. Often used in combination with BRAF inhibitors like dabrafenib for enhanced efficacy. The DMSO solvate form is typically used in research settings for in vitro studies to maintain stability and solubility.