Riluzole and Sorafenib Tosylate in Treating Patients With Advanced Solid Tumors or Melanoma

This phase I trial studies the side effects and best dose of sorafenib tosylate when given together with riluzole in treating patients with solid tumors or melanoma that has spread to other places in the body and usually cannot be cured or controlled with treatment. Riluzole may stop or slow the growth of tumor cells. Sorafenib tosylate may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving riluzole together with sorafenib tosylate may kill more tumor cells.