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From mechanism to resistance - changes in the use of dexamethasone in the treatment of multiple myeloma.

Glucocorticoids, including dexamethasone, have been a mainstay of treatment for multiple myeloma (MM) for decades. In current treatment protocols and NCCN clinical practice guidelines, dexamethasone is included in all phases of MM treatment as a key adjunct to novel therapies within all preferred therapy regimen, augmenting clinical response rates to these agents. The inclusion of dexamethasone in MM treatment regimens, combined with novel agents, continues to deliver good response rates. Further understanding of drug combinations and dose modifications is anticipated to enhance clinical care, mitigate toxicities and optimize outcomes. New formulations are providing the opportunity for a reduction in pill burden and potential for medication errors, whereby improving treatment adherence. Here, we summarize and discuss the role of dexamethasone in the treatment of MM, its mechanism of action and doses used, and provide a critical appraisal current evidence and its clinical implications.