Can You Use Metamucil For IBS With Diarrhea?

Answer

Thanks for reaching out to us! More than happy to talk about how fiber can be helpful for IBS (with diarrhea).

Irritable bowel syndrome (IBS) is one of the most commonly diagnosed gastrointestinal disorders according to studies, affecting more than 10% of the population. Common symptoms of IBS include:

• Bloating
• Lower abdominal pain
• Diarrhea or constipation

IBS is commonly classified as either constipation-predominant (IBS-C) or diarrhea-predominant (IBS-D) and depending on which you are diagnosed with will determine appropriate treatment options.

For first-line treatment of IBS, guidelines begin by recommending reducing the use of foods or other triggers that worsen symptoms such as certain types of carbohydrates (e.g. "Di" and" mono" saccharides) that ferment in the GI tract and other substances like caffeine, lactose, or artificial sweeteners. After lifestyle modifications, medications or supplements often come into play.

Metamucil Fiber For IBS-D

Even though fiber is often associated with helping to go to the bathroom more often, studies suggest that soluble fiber, such as Metamucil (psyllium), can help relieve symptoms of IBS-D such as:

• Abdominal pain
• Stool consistency

Metamucil works by absorbing liquid in the gastrointestinal tract, causing an expansion of the stool, which stimulates peristalsis and bowel movement. It may be a good non-pharmacologic treatment for many individuals. It is important to note though that some studies have reported that Metamucil type fiber supplements can exacerbate symptoms in some patients and therefore should be used under the supervision of your doctor.

It should be noted that studies are conflicting and there are more than a few that suggest that fiber products aren't significantly helpful in reducing symptoms.

Soluble Or Insoluble Fiber?

It is important to note that the type of fiber that is recommended for IBS-D is soluble fiber such as psyllium (Metamucil), not insoluble fiber, like bran, which can often increase cramping and bloating in IBS patients.

One recommended dosing strategy for fiber is to start with one tablespoonful of soluble fiber (like Metamucil) with one meal daily, and dosing gradually to include fiber with two or three meals daily.

As mentioned, soluble fibers can often be a good initial, non-pharmacologic treatment option for IBS patients if advised by your doctor. However, depending on the severity of symptoms of your IBS-D, other drug options may be needed such as Imodium (loperamide), Lotronex (alosetron), Xifaxan (rifaximin) or Viberzi (eluxadoline).

Final Words

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