According to my GP and several other sources I've come across, depression can be connected to dealing with chronic pain. It makes sense to me. Personally, I am on amitriptyline, and I know several others are on some sort of anti-depressant as well.
Hope this helps.
Hugs,
Nancy in NB
Help spread the word. Find out more about National Invisible Chronic Illness Awareness Week September 23-29, 2002, at http://www.invisibleillness.com