Final answer:
The anemia in the Alzheimer's patient taking donepezil (Aricept) could be caused by the drug ibuprofen (Advil) when taken in combination with donepezil.
Step-by-step explanation:
The anemia in the Alzheimer's patient taking donepezil (Aricept) could be caused by the drug ibuprofen (Advil) when taken in combination with donepezil. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that can trigger ulceration and gastritis. These gastrointestinal issues can lead to blood loss and anemia.