MEK inhibitors block the activity of a cell protein called MEK, a molecule that helps regulate cell growth. MEK is part of a signaling pathway that includes BRAF, another protein. A BRAF mutation signals cells, via MEK, to develop abnormally and divide out of control and grow into a melanoma tumour. MEK inhibitors act on melanomas that have the V600E or V600K mutations in the BRAF protein. These drugs interfere with abnormal BRAF signals to slow or stop the out-of-control cell growth.
Common side effects can include rash, nausea, diarrhea, swelling and sensitivity to sunlight. Rare but serious side effects can include heart damage, excess bleeding, lossof vision, lung problems and skin infections. MEK inhibitors are commonly combined with a BRAF inhibitor as a combination therapy. This seems to shrink tumours for longer periods of time than using either type of drug alone. Some side effects (such as the development of other skin cancers) are actually less common with the combination.
Always talk to your doctor, pharmacist or nurse about your side effects so they can help you manage them.
Trametinib (Mekinist) for Metastatic Melanoma (pCODR 10030)
Note:Funding criteria as listed on the decision date. Please refer to the provincial drug programs for the most recent funding criteria and program eligibility.
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