Hi there...I know that withdrawal from this class of drugs can cause chronic pain...the seratonin(which is a pain reliever) that was once 'boosted' by the drug has to reboot in the brain and start working naturally again. Many people coming off these drugs are diagnosed with fibromyalgia as there seems to be no organic reason for the pain. I happen to have fibro and was given a similar drug to help with pain. After I weaned off, the pain was unbearable...100x's worse than any fibro flare I ever had. Personally, I would not jump to the conclusion that she has fibro just yet. I know too many people that were diagnosed with fibro after coming off one of these drugs, put on another antidepressant and the cycle started all over again. For me, the cure was worse than the disease.
JMHO.
Donna