memantine
noun
mem·an·tine
| \ ˈmem-an-ˌtēn
\
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Medical Definition of memantine
: a drug that blocks the action of glutamate and is taken orally in the form of its hydrochloride C12H21N·HCl in the treatment of moderate to severe Alzheimer's disease
Note: Memantine is marketed under the trademark Namenda and when used in combination with donepezil, under the trademark Namzaric.