Looking on the net, zetia is not a statin. So, if you were concerned about
statins, you could discontinue the Chrestor (which is a statin) and stay
with the Zetia.

You should speak to your doctor of course, but unless your husbands
cholesterol levels were remarkably high, then its unlikely staying off them
for a few weeks would make much difference, its more of a long-term thing
than an immediate problem.

Its also interesting to know if you tried a different diet on him, I have
lowered my cholesterol levels by 25% in 8 weeks by change of diet and
exercise, which is what the Zetia web site claims you can do when its used
in conjunction with a statin, eg no need for drugs for me. Wont work for
everyone of course but well worth trying if he didnt change his diet before
going on the drugs, since many people can lower their cholesterol by doing
this.
Unfortunately, the reality is that a very small percentage of people who
take statins will get anything approaching dementia because of it, so the
chances that they are the cause for any one person is minute. So dont hold
your breath, its only worth trying because the downside isnt that big.

I could be wrong but I dont believe that LBD is a precursor to Az, its an
'alternative' if thats the right way of putting it, eg if you have dementia,
amongst the many types there is Az and there is LBD.

Good luck.