In recent years my research has focused on two areas: 1. the hazards of anti-psychotic medication in dementia and how to avoid its use; 2. clinical trials of anti-dementia drugs in Alzheimer's dementia. 

Most recently I have worked on the use of B vitamins to lower plasma homocysteine in people with so-called "mild cognitive impairment" (MCI), many of whom go on to develop full-blown Alzheimer's dementia.  A relatively high plasma homocysteine is a potent risk factor for dementia.  The rationale for this is that slowing the pace of MCI, and thus delaying the onset of dementia, even by only a few years, in an elderly population would significantly reduce the number of people who develop the disease.