Would your wife's doctor not prescibe a short burst of Temazepam.This might help her re- establish a sleep pattern.
I think it works as a hypnotic.
I have been on a small dose for years and half a tablet will send me quickly off after i have been awaken,usually about two am, for my old man's toilet wanderings.Lack of sleep apres tiddle(s) was causing depression.
I pointed out to my GP sometime ago that the tablets were thought to be addictive but he reminded me he was the doctor and at my age i had more to worry about than thoughts about becoming a temazepam junkie.
Feng shui,herbal tea or Nytol did little to help me.
N