They tend to worsen memory quite a bit. They tend to make people very confused. This is the major thing to watch for. Some beta blockers. Usually high blood pressure medicines are okay.
Diuretics are generally very safe.
You have to watch all medications. You can do several things for those who are taking care of that demented individual to assure their safety. Individuals with dementia should not drive. They should not cook or be left living alone. There was one study that showed that those who took two thousand units of vitamin E per day had lower chances than the control group.