You are not alone suffering with this problem.
In fact all the SSRI
anti depressants cause this.
However,you can still find a way.
Don't stop the medicine completely at once.
Try to split your tablet in 4 parts and then start taking 3 parts of it daily.
You may have some problem but your body shall withstand it.
Keep giving this dose to your wife for 6 weeks and let the body adjust to this 3/4 th of the dose.
Repeat the sme again after 6 weeks and start giving 2 parts and then so on.
I hope your wife shall be able to come out of it in 6 months time.