My partner has recently been diagnosed as having early-stage dementia or Alzheimer's. Following an accident requiring major surgery, she has been taking strong painkillers for 6 years. I understand that these can have a detrimental effect on memory and am wondering whether any work has been done on determining the effect they may have? The recent tests did not seem to take this into account. I'm wondering also whether there are any research facilities or 'centres of excellence' for dementia evaluation in the south of England, outside London...?