Chemo options

My wife had the whipple operation on Jan 9. Stage 3, 3cm tumor in the head of the pancreas. She is 59 and on lithium for biploar disorder and has some kidney damage. She has lost about 20% of her body weight since the original diagnosis. The oncologist has recommended Gemcitabine as it is milder than Folforinox. He has recommended starting on a 75% dose, and then adding Capecitabine later on if she is tolerating the Gemcitabine well.

My wife originally did not want to do any chemo, but I think that it would make sense to at least try the Gemcitabine; she can give it up if it is causing quality of life issues and go back to her original strategy. I think there is only upside to trying it. Just wondering if anyone can give there feedback on taking this drug? Is it truly mild (and I realise it varies by person)? And if this new strategy makes sense?