This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Which of the following statemnets is FALSE about the drug treatment with Memantine? 
Select and explain. 
A. It is neuroprotective, B. It has a long half life, C. It is used in treatment of moderate dementia, D. It is a NMDA receptor agonist
D: It is a NMDA receptor agonist
Answer: D: It is a NMDA receptor agonist 
Explanation: Memamntine is a NMDA (N-methyl D-aspaate) antagonist (not agonist) used in the treatment of Alzheimer's disease. Memantine 5-10mg per day is used in the treatment of moderate dementia. It is theoretically neuroprotective and has a half life of 100 hours. It also has 5HT3 (serotonin receptor) antogonistic propeies as well. Ref: A Sho Text Book of Psychiatry by Niraj Ahuja, 2006, Page 27