@longboat1
Our situation is very similar. My husband (88) is on memantine and donepezil, is pretty normal except for memory loss, and has one copy of the Apoe4 gene. He was in a trial of what ended up being named Leqembi, but he was dismissed from the trial after developing a number of small brain bleeds. The trial experienced at least one fatality attributed to brain bleeds. So you probably chose wisely. If lithium orotate actually helps, it will be a miracle!