Insomnia, any new ideas?

[3putts <3putts@xxxxxxxxxxxxxxxxxxx>]

My husband, Bob (47, 5yrs.) is still bothered with the PD insomnia.  He has
tried:

Benadryl (two, 50 mg.) - this works for several days then does not
Ambien (10 mg.)          - this works for about 10 days and then does not
St. John's Wort            - gets to sleep only for one hour
Melatonin                    -   does not work
Chamomile (passion flower) Tea   -  does not work
Amytriptaline               - does not work
relaxation tapes           -  does not work
self hypnosis               -  does not work
warm milk                   -   does not help
warm baths                 -  does not help
cheese/peanut butter   -  does not help
exercising early evening  -  does not help
B complex vitamin with banana   -  does not help
Valerian Root      -  does not help
canceling all daytime naps   -  does not help

Bob had a unilateral Pallidotomy on Sept. 26, 1997, and for two days after
the surgery he slept like a baby, but now, back to the same old insomnia.
Does anyone have any ideas that we have not thought of?  His other symptoms
(pre surgery) have definitely improved by about 90%.  Lack of sleep was one
of the worst symptoms though, and it still is.

Any new ideas would be appreciated.

Regards,  Jackie