Yep, our bodies change, brain chemistry, I am no expert by all means, but meds that worked or didn't work so often do the opposite over time, why? I have no idea, but know it happens.
Maybe the brain becomes "immuned", life changes, hormones, can be factors in this?
Traz, never did nice things for me, 2 days and I was off of it, even pdoc agreed.
It gave me a huge headache the morning after, constipation, all those nasty things . . . yet my one brother says its great for him.
Best thing to do is take this reaction up with the prescribing physician, perhaps a change of meds will help.
Take care now,

DE