Memantine

Memantine is a medication used to slow the progression of moderate-to-severe Alzheimer's disease. It is taken by mouth.

Memantine
Clinical data
Trade namesAxura, Ebixa, Namenda, others
AHFS/Drugs.comMonograph
MedlinePlusa604006
License data
Pregnancy
category
  • AU: B2
Routes of
administration		By mouth
Drug classNMDA receptor antagonist
ATC code
Legal status
Legal status
  • AU: S4 (Prescription only)
  • BR: Class C1 (Other controlled substances)
  • UK: POM (Prescription only)
  • US: ℞-only
  • EU: Rx-only
Pharmacokinetic data
Bioavailability~100%
MetabolismLiver (<10%)
Elimination half-life60–100 hours
ExcretionKidney
Identifiers
  • 3,5-dimethyltricyclo[3.3.1.13,7]decan-1amine
    or
    3,5-dimethyladamantan-1-amine
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.217.937
Chemical and physical data
FormulaC12H21N
Molar mass179.307 g·mol−1
3D model (JSmol)
  • NC12CC3(CC(C1)(CC(C2)C3)C)C
  • InChI=1S/C12H21N/c1-10-3-9-4-11(2,6-10)8-12(13,5-9)7-10/h9H,3-8,13H2,1-2H3 Y
  • Key:BUGYDGFZZOZRHP-UHFFFAOYSA-N Y
  (verify)

Common side effects include headache, constipation, sleepiness, and dizziness. Severe side effects may include blood clots, psychosis, and heart failure. It is believed to work by acting on NMDA receptors, working as pore blockers of these ion channels.

Memantine was approved for medical use in the United States in 2003. It is available as a generic medication. In 2020, it was the 152nd most commonly prescribed medication in the United States, with more than 3 million prescriptions.

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