Ebixa/diet
Hello Ron
Sorry to learn that your wife is having a poor reaction to Ebixa - perhaps there could be another underlying medical reason? or if she is also on another medication the combination of drugs could cause adverse effects, dizziness is a recognised side effect that some people experience when taking Ebixa - probably best to get this checked by her doctor if you haven't done so already.
With regard to diet. I suggest you approach this with some caution. There are all sorts of unsubstantiated claims about what particular diets and/or dietary supplements can do and these are based on some pretty ropey research - if any research at all. Generally, if you scratch the surface, you'll find that the person writing about them has a vested interest in marketing them too.
Whilst there is emerging research to suggest that diet and lifestyle factors linked to heart disease are increasingly important in minimising the risk of dementia the claim that Alzheimer's is largely a preventable disease is misleading.
Generally speaking, in terms of diet, the usual sort of 'healthy diet' rules apply. A healthy diet being only as healthy as the food that is actually eaten. You could try asking your gp surgery if there is a dietician/ nutriotionist, to whom your wife could be referred to get some sound and practical advice.
It is sometimes helpful to give vitamin supplements to people in the later stages of dementia, but it would be best to speak to your wife’s doctor first. He or she will be able to advise you on which supplements, if any, might be best for her.
The Royal College of Psychiatrist website has some handy qs&as about eating
http://www.rcpsych.ac.uk/college/faculty/dementia/four/five.htm
hope that's of some help