If you are having a really rough time of it, you could ask your pdoc if you can be RX'd 20 mg tablets and go down in increments of ten instead of thirty using the 30s and the 20s. [50, 40, etc.]
It will take a little longer, and you will have to pay for another script but would certainly ease the transition.

One other option that is sometimes done is a doctor will RX an SSRI [prozac, luvox, celexa, zoloft] to transition to from the SNRI and then you drop the dosage of the SSRI... This may be less expensive or may not matter, depending on what you have for medication coverage and may also be complicated for your particular situation.

SNRIs are notoriously difficult to discontinue for a lot of people- I would call your pdoc and ask about either of these options or what they may have as other suggestions.