Any luck with Hexalen?

I was wondering if anyone has been on Hexalen for any length of time? My sister was dx IIIc 9 years ago and has exhausted every other option. She has been on Hexalen for a few days and is having a lot of abdominal pain. Her main oncologist didn't want to prescribe it, but his partner has had good results with a few patients, so she is trying it. They've taken her off all other chemo, becuse it has stopped working. Even though the pkg insert said to call your Dr if you have abdominal pain, she did and they said they didn't know what to tell her. I thought I might find some answers from some of you ladies who know first hand what she can expect. Thanks so much, and God bless you all.