I appreciate that information, and am so sorry you have tried so many things to no avail. There are other narcotics / opiates that have been used for pain.
Methadone is one that has a good track record for pain management. You may be familiar with it as its whats given to heroin addicts to ease the pain of heroin withdrawal. (Essentially, one addiction is substituted for another; methadone is addictive as well).
Dilaudid is a synthetic opiate narcotic, hydromorphone, and is thought to have a lower dependence potential and less troublesome side effects than morphine. http://www.drugs.com/dilaudid.html
Percoset is Tylenol and Oxycodone. http://www.drugs.com/percocet.html
Percodan is Aspirin and Oxycodone. http://www.drugs.com/search.php?searchterm=Percodan
Oxycodone is used to treat moderate to severe pain, but I have the feeling if you are taking morphine, you have tried this and it has failed for you. But in case you have not, I include it. The same is true for codeine preparations, of which there are many. Here is general information on codeine: http://www.drugs.com/codeine.html
All medications have side effects. Some side effects are not bad though; some medications act to potentiate each other when combined. Phenergan is one example. It is an anti histamine, but when its given with demoral and morphine, it helps to make the demoral or the morphine more effective. Here is information about phenergan:http://www.drugs.com/phenergan.html
Your doctor would know more about the many medications that would work well together. Phenergan is just one example; there are many.
Tramadol or Ultram is a synthetic that is based on morphine, but it is not morphine. Its called "narcotic like" but can cause dependence, and should not be taken with opiates or narcotics. http://www.drugs.com/tramadol.htmlFentanyl
is a powerful and risky opiate. It is a patch, and that patch has caused problems for some people. It is used mainly for breakthrough pain of cancer, but may be used for other purposes. Information on Fentanyl is here: http://www.nlm.nih.gov/medlineplus/druginfo/meds/a601202.html
I also still suggest discussing the NON medicinal alternatives...the TENS unit may help allot. Also discuss the amitriptyline; I find it effective for my pain.
I hope I was able to help,