I've had IBS for thirty years.
I lean more toward the constipation kind, even though most people would argue that going to the bathroom five times a day is hardly constipation. It's just that my stools are a little harder than average, even though I eat a lot of fiber.
I was diagnosed with hish cholesterol a while back, and the doc prescribed 10 mg of lovastation per day. Since I began taking it, I only have one or two BMs a day instead of five or six, and they are both quick and satisfactory.
One of the major side effects listed for this drug is diarrhea, so for those of you with loose stools, you might want to avoid this drug. But if your stools are a tad hard to pass, this might be worth a try. This drug is available in generic 10 mg and 20 mg for a one-month supply for $4 at both Target and Walmart, even without any insurance.