New drug to treat pain

Has anybody heard of a new pain medicineto treat colon pain that does not constapate you? I have a IBSC and have to use a enema to have a bowel movement. I never have a urge. I have severe pain that lets me know I need to have a bowel movement and then after I take the enema I still have pain. I have been to the ER several times with the pain. The doctor said the only thing they can do is to remove my colon. They said I have a slow transit colon and the food says in so long it causes pain. They will not give me any pain meds b/c of my IBSConstapation. Any informaion on this drug or if you have slow transit colon problam will be wonderful.