Treatment includes addition of more fiber in your diet,cessation of smoking and taking stress,antispasmodic medicines,antidiarrheal medicines,antidepressants and new medicines like Alosetron (Lotronex) and
Tegaserod (
Zelnorm).
You can read more about this from the following website and discuss it with your doctor:
http://www.emedicinehealth.com/irritable_bowel_syndrome/article_em.htm
Hope it helps.Take care and pls do keep me posted on how you are doing.