As has been said, you will find that the Ativan helps to take the edge off in a very big way. You may also consider Haldol for this as well. As for alternative administration methods, Durmorph can be given orally (with eye dropper or small sirynge). It does not have to be swallowed and can be absorbed in the mouth. If possible, you could give it to her while sleeping and just let it absorb in the mouth.
I am the caregiver (along with a lot of help from Hospice) to my mother who was diagnosed in september. We are in what seems like the final stages of the disease process. While we have been able to manage pain with oral medication (pills) she is no longer able to swallow well. Just Monday, she received a Moraphine pump that has been a wonderful option. The pump is programed to administer continuously and there is a button for "on demand" supplemental dosage. Our Ativan has also been switched to liquid as I described above on the Durmorph.
Consider these options. They have really allowed my mother to rest much more peacefully.
I am new here, but would like to offer any help or support to anyone going through this. As we are approaching the end, I feel an intense need to not only share my experience, but to help others who may have no idea where to turn or what they may be in for.
John