A Patient Recently Diagnosed with Alzheimer's Disease Is Placed on Memantine

A patient recently diagnosed with Alzheimer's disease is placed on memantine (Namenda) .The family asks why this medication is given.Which explanation(s) by the nurse is/are accurate?(Select all that apply.)

A) Memantine prevents the neurodegeneration of the disease.
B) Memantine improves word recall.
C) Memantine increases the ability to do tasks.
D) Memantine improves sleep.
E) Memantine increases appetite.