Please select the eligibility criteria that correspond to the clinical trial below.
Title: N/A
Brief Summary: This is a 52-week, multicenter, open label trial of memantine (Namenda) for frontotemporal lobar degeneration (FTLD). The goal is to determine the safety and tolerability of this FDA-approved medication for Alzheimer's Disease in patients with FTLD. Secondary outcome measures include cognitive batteries, rating scales for activities of daily living and neuropsychiatric symptoms. All patients receive the FDA-approved dose of this medication for Alzheimer's disease.


Options:
A: Inclusion Criteria:

1. Diagnoses of possible or probable Alzheimer's disease (NINCDS-ADRDA)
2. Presence of a caregiver (friend or relative) who can assume responsibility for medication compliance, can accompany the patient to all visits, and rate patient's condition
3. Written informed consent from both the patient (or surrogate) and caregiver
4. An MMSE score between 12 and 26 inclusive
5. Administration of a maintenance dosage of donepezil (5-10mg/d), rivastigmine (6-12mg/d) or rivastigmine (Exelon) patch (4.6 mg or 9.5 mg), galantamine or galantamine ER (16-24mg/d) for a minimum of 4 weeks prior to randomization
6. Agreement not to take vitamin E supplements and/or memantine outside of the study (daily multivitamin is permitted containing up to 100 IU alpha-tocopherol)

Exclusion Criteria:

1. A non-Alzheimer primary dementia (e.g., vascular dementia, Lewy body dementia, fronto-temporal dementia, vitamin B-12 deficiency, hypothyroidism)
2. Current major depression, delirium, alcohol or psychoactive substance abuse or dependency, schizophrenia, or delusional disorder as defined by DSM-IV
3. Presence of any uncontrolled systemic illness that would interfere with participation in the study or a life expectancy of less than one year
4. Pregnant or intention to become pregnant
5. Enrollment in another interventional clinical trial
6. Current prescription with more than one AChE inhibitor
7. Current prescription for warfarin
8. Use of vitamin E supplements in the past 2 weeks
9. Use of memantine in the past 4 weeks or known intolerance
10. Estimated creatinine clearance less than 5ml/min (Cockcroft-Gault formula)
11. Use of amantadine in the past 2 weeks
B: Inclusion Criteria:

* The study population will consist of male or female outpatients at least 50 years of age with mild to moderate disease severity (MMSE 12 to 24 inclusive) according to UKPDS and DSM IV TR criteria (for PDD patients) and the third report of the DLB consortium (for DLB patients) and who have a knowledgeable and reliable caregiver to accompany the patient to all clinic visits during the course of the study.

Exclusion Criteria:

* Evidence of clinically significant active disease, evidence of other neurological disorders, and current treatment with AChEIs.
C: Inclusion Criteria:

1. Residential/Inpatients at recruitment to the study with a history of at least 2 weeks behavioural disturbance.
2. Alzheimer's Disease only as per McKhann Criteria + Hachinski Score\<=4.
3. Moderately severe to severe Alzheimer's Disease (baseline MMSE \</=19).
4. Clinically significant agitation that requires treatment.
5. Severity of agitation defined by Cohen Mansfield agitation inventory (CMAI) \> /=45.
6. Age \>/= 55.

Exclusion Criteria:

1. Memantine usage in the 4 weeks prior to the start of the study.
2. On Cholinesterase inhibitor for less than 3 months and not on a stable dose.
3. Anti-psychotic, anti-epileptic, antidepressant, benzodiazepine, lithium or hypnotic dosage alteration in the 2 weeks prior to the start of the study.
4. Antiparkinsonian medication.
5. Hypersensitivity to memantine or any of the excipients in the formulation.
6. Severe renal impairment.
7. Epilepsy, history of convulsions or seizure, or receiving any anti-epileptic treatment.
8. Concomitant usage of N-methyl-D-aspartate (NMDA) antagonists such as amantadine, ketamine or dextromethorphan.
9. Recent myocardial infarction, uncompensated congestive heart failure and uncontrolled hypertension.
10. Severe, unstable or poorly controlled medical illness.
11. Any disability that may interfere with the patient completing the study procedure.
12. Active malignancy.
13. Delirium, pain or any medical illness as a clear cause of agitation.
14. Any important drug interactions: Prohibited during study and in the 14 days preceding enrollment/inclusion are: Analgesic dextromethorphan, Dopaminergics- amantadine, Warfarin due to theoretical INR prolongation.
D: Inclusion Criteria:

* Neary et al. Criteria for Frontotemporal Lobar Degeneration
* Age 40 -80
* CDR \< 3 or MMSE \> 15
* English Speaking
* Study Partner

Exclusion Criteria:

* Concurrent use of antipsychotic drugs or acetylcholinesterase inhibitors

Answer: D