You may be tempted to take control of IBS by stocking up on over-the-counter laxatives or antidiarrhea medication. Don't do it unless you get the go-ahead from your doctor. IBS is a chronic disorder, and over-the-counter medication is a short-term fix. Laxatives in particular can be hard on the intestines if used inappropriately. If you find yourself relying on OTC meds, talk with your doctor to find a better solution.