People who want to increase their fiber intake or who are experiencing constipation sometimes take supplements containing psyllium. Psyllium husks provide soluble fiber that absorbs liquid from the intestines, making your stool bulkier and softer so they are easier to pass. However, psyllium supplements can cause side effects, including belching.
Psyllium and Belching
There was an increase of between 1.2 percent and 2 percent in the risk for abdominal gas, bloating, belching and flatulence in patients with fecal incontinence who took psyllium supplements containing 16 g of fiber for 32 days, according to a study published in "Nursing Research" in May 2011.
Other Possible Side Effects
Although psyllium is generally well tolerated, psyllium supplementation can cause side effects including choking, stomach pain, nausea, vomiting, itching, skin rash, difficulty swallowing and difficulty breathing. Speak with your doctor right away if you experience any of these more severe side effects, and discontinue use unless your doctor advises you otherwise.
Limiting Side Effects
Start with a small dose of psyllium and work your way up to a larger dose, as increasing your fiber intake suddenly can cause side effects including bloating, gas and belching. Drink a full glass of water with psyllium to keep it from swelling, causing you to choke. Drink at least six to eight glasses of water throughout the day to prevent constipation associated with increased fiber intake.
Considerations
Speak with your doctor before taking psyllium to ensure it is safe for you, and do not take this supplement for more than one week unless your doctor approves. Take psyllium at least 2 hours before or after you take any other medications, as it can interfere with their absorption otherwise.



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