IBS Medication - Irritable Bowel Syndrome For moderate to severe IBS, your doctor may give you medicine to help with symptoms, like the most popular one is Alosetron (Lotronex), because it is the only one specially produced for specifically coping with IBS. It helps to relax the colon and slow the movement of stool through the bowel. It is not recommened for use by men. And you can use only with prescription by doctors and if you have failed usual therapy for IBS.  laxatives IBS treatment: to treat constipation like sorbitol, lactulose (Chronulac and Kristalose) or polyethylene glycol (MiraLax or GlycoLax) or newer medication is tegaserod (Zelnorm) could also help. Note: Taken in long run they can be even bad for your health and they can offer only limited relief. antispasmodics IBS treatment: to slow contractions in the bowel, which may help with pain, cramping and diarrhea, relaxing the smooth muscle of the gut and relieving stomach cramps. The main side effect what these drugs can cause is constipation, also dryness, blurred vision, drowsiness. The most popular brands of antispasmodics are Bentyl and Levbid, hyoscyamine (like Levsin, Cystospaz and Anaspaz) could be good for cramping and pain or the doctor also could recommend dicyclomine (e.g. Di-Spaz, Bentyl or Bemote), tranquilizers such as Librax and Donnatal. For diarrhea cholestyramine (Querstran) or loperhamide (like Imodium). antidepressants as IBS treatment: Such as Paxil and Celexa are good for patiens who suffer with constipation, but the side effects can include loss of appetite, nausea and diarrhea. For patients with diarrhea doctors could advice drugs e.g. Pamelor, Elavil and Norpramine, but then side affects would include blurred vision, dry mouth and drowsiness. Fiber supplements IBS treatment: corn fiber, psyllium, wheat bran, calcium polycarbophil, psyllium (Metamucil) or methylcellulose (Citrucel) with fluids may help to control constipation. Anticholinergic medications IBS treatment: These drugs can help to relieve painful bowel spasms affecting nervous system (anticholinergics)