"My wife and PA both noticed real changes in me after two or three months on it (Aricept). I used to fumble with buttons and needed help with seat belts. Now, I get dressed normally and seat belts slide in first time. Mentally, it's the difference between a sunny day and an overcast day. Ye Gods, that's worth it!"Terry Pratchett donated one million of his own funds for Alzheimer's research.
He has been his awarded a knighthood for services to literature. Pratchet sold more than 55 million books worldwide. He is best known for his Discworld comic fantasy novels.