一水氫溴酸右旋美沙芬抑制劑Methyl analog of DEXTRORPHAN that shows high-affinity binding to some areas of the brain, including the medullary cough center. This compound is an NMDA receptor antagonist (receptors, N-METHYL-D-ASPARTATE) and a non-competitive channel blocker. It is one of the extensively used antitussives and is also used in the research of the relationship of glutamate receptors with neurotoxicity.