Unfortunately, gastroparesis is a huge pain to deal with. The first thing I'd recommend is for her to find a support group. The Yahoo! Groups gastroparesis group is probably the best out there, from what I know. (Go to groups.yahoo.com and look for "gastroparesis".)
Second, is she seeing a specialist about this? GP is a condition that's not well understood by many in the medical community: many haven't even heard of it. (I just got back from the hospital from a surgery. The nurses thought my condition was "gastrophoresis" -- they'd never heard of GP! The surgery, btw, was for something totally unrelated.) If you can, try to find someone who specializes in gastroparesis. There are other options for drugs and treatments out there, for example Domperidone (instead of Reglan). Gastric pace makers have also been approved. Acupuncture works VERY well when it's done by a good, experienced acupuncturist. (someone who is also VERY familiar with herbs.) There are some herbal remedies, shatavari and iberogast, for example, which can help. (They should not be taken together, and shatavari should not be taken with domperidone.) Alpha Lipoic Acid is also helpful since it helps regenerate nerve function; if the issue is being caused by a malfunctioning Vagus nerve (likely) then this may offer some help.
Third, have they even looked for an underlying reason for the GP? My case was idiopathic, post viral, and it, after 2 years, almost totally cleared up HURRAY!). However, many things can cause it: thyroid issues, Addison's, early onset Parkinson's, multiple sclerosis, connective tissue disorders, smooth muscle disorders, etc. They should have been checking for all of these.
The problem with people who don't deal with GP patients regularly is that they don't see the hell most gastroparetics go through. Emotionally, it's extremely hard to deal with this condition, and doing it alone is nigh impossible. Have her check out the support group and go find doctors who specialize in this condition, even if you have to travel.
Thank you for the info. My son has Gastroparesis since hes been 13 but, just got dignosed three months ago. I found Dr. Parkman who is excellent but, has allot of patients because Dr. Fisher is retiring. There are other doctor so check out the Mayo Clinic. If you have a computer there's allot of information you can find out, just search.If you live near Philadelphia are there are alot of excellent hospitals in that area.